[Hearthstone Card (Infiltrator Lillian) Not Found] is going to sit in your collection figuratively gathering dust, but if you disenchant it she'll literally gather dust!

Having Kobold Sandtrooper as your only Deathrattle makes Vectus difficult to play. You need at least 2 Deathrattles to die to play him, as far as I could tell from the pre-release streams. 

Is it bad that I genuinely enjoy these streams? I actually really like watching people make new decks on expansion day because I'm a F2P that hasn't been playing for a long time, so I only ever get to craft about 3-4 decks per expansion. As a result, I can't actually make my own decks aside from theorycrafting it in a deckbuilder, but it's a different environment than the ladder. 

As for the meta being "solved" within this stream alone, I do agree that people (like me) just want to netdeck, but I think that's a bit of an exaggeration. Sure they may find a powerful deck or two, but to say that the meta will be known before the expansion even launches is to say that these players are good enough to optimise decks to a competitive level within one stream, which I find highly unlikely. I just enjoy watching people playing new decks with new cards.

Ok, I get what you mean now. And after looking at the card dump stream, it does look like Hunter has quite a few deathrattles up its sleeve to make this harder to play.

What are the significant beasts that cost 5 or less? The only ones that come to mind are Tundra Rhino, Augmented Porcupine and Zixor, Apex Predator or Hunter and the only Druid beast is Crystal Stag. Outside of the two classes, there is only King Mukla or Escaped Manasaber that's worth pulling. Safe to say, doesn't look that great, but I'll keep my hopes up for some spicy beasts in the reveal stream.

There's a difference between "now" and "after release". Nerfing 10+ cards does tend to make a class weaker.

What demise does this card fall into that Rattlegore does as well?

I agree with you, but in what situation are you playing [Hearthstone Card (Leper Gnomes) Not Found] and you're in the late game against a DH and you haven't been slaughtered yet?

Yes, you can't run hard removal, but how much hard removal does Paladin actually have? Subdue is the only card I can think of that counts as a "removal" card that would be run in a deck. Paladin just doesn't have direct damage removal, they're about balancing board presence with spells and weapons to gain tempo. 

I do agree though that Priest has this problem. Being unable to run cards like Time Rip, Forbidden Words, Shadow Word: Pain, etc. does suck for slower Priest decks. However, I think that you'd probably not run this card in a slower Priest deck for that reason; a more board-centric mindrange Priest deck with buffs like Power Infusion, Apotheosis, Grave Rune, Psyche Split, etc. would absolutely warrant a spot for this card imo.

Why is it the bane of Galakrond Priest? As you said, you can get dicked by cards like Shadow Madness.

This card looks really cool for a slower Shaman/Druid deck, especially considering that even a 2 cost spell can swing the board into your favour as early as turn 5. Both Shaman and Druid also have some type of minion duplication in the form of Germination and Vivid Spores that could really cement your board position. It's even possible we could see this card in more midrange decks like Galakrond Shaman.

Does this work by getting the highest attack, then the highest health, or just the highest total stats? If there's a Magma Rager and an Am'gam Rager on the board, does this become a 1/5, a 5/1 or a 5/5?

This is like a bigger & maybe better Primalfin Champion? Because the first thing that came to mind was "LIBRAMS!!!!"

Suddenly Jandice Barov is looking pretty spicy.

Now that you've said that I want to do exactly that on day 1 of the expansion just to prove you wrong

Oh, well in that case I misunderstood. I didn't know that's how these types of cards worked.

Cards like Goody Two-Shields and this one make me excited for a midrange Paladin deck. The former can probably see play in aggro decks because it's just a good card, but I think this one costs a bit too much to be in aggro.

Also, sad Vivid Nightmare noises.

If they had one Convincing Infiltrator why would you want to give them 2? The only circumstances I can see where you'd want to cast this on an opponent's minion are Unlicensed Apothecary, Venture Co. Mercenary, some jank Wrathguard combo or to heal yourself with cards like Corrupted Healbot and Hench-Clan Shadequill. So there's a few, but nobody plays these cards.

EDIT: I didn't know that playing cards that summon copies on your opponent's minions summoned them on your side of the board.

We've got more than half the cards left to see in this expansion. Who knows what could happen once the expansion releases; maybe Discard Warlock makes a comeback, maybe Control Priest becomes meta and DH can't play Glide. It's too early to decide what the meta will be.

This looks pretty spicy, basically a better Da Undatakah in most cases, barring the few situations where you'd rather have 3 deathrattles. The 2 Whelps makes it harder to silence, and they don't specify "different" deathrattles, so you can hit the same one twice. Deathrattle decks are some of my favourites; I absolutely loved Deathrattle Hunter with Oblivitron and all of the Deathrattle Rogue archetypes in previous years. However, whether or not there are enough worthwhile deathrattles to run this card will be the biggest factor to if this card sees the light of day.