Don't really get how this should work. I mean you remove base strength of a unit, would it then die, if the remaining strength would come from buffs? By the current logic is would, because you can't e.g. snipe a Nekker with Maerdrome afaik.
And even if so, this wouldn't help much with Nekkers. Even if you could still snipe a buffed nekker, you would just make the next one reappear, in most cases with the same buff. There's other ways that hurt consume monster much more.
And if the snipe-nekkers logic would apply, these units would in the case of bronze units only do very small dmg levels (~2) as base dmg would need to be rated higher than regular dmg, highest dmg removal of bronze cards is 3 atm - or their own power level would be rather small. And having this whole thing just for gold and silver would kinda ruin the idea.
If the devs think those cards are OP they should rather nerf the specific cards - not add counters to them. Would be as pointless as blizz potion - great counter against weather and dead against all others.
Personally I just think the game needs more tweaking, we will always have stronger and weaker decks and Gwent with just 5 factions and not the full card pool yet (?) is bound to see a more limited set of decks in competitive play esp. in a closed beta environment.
What is bothering me more is that the recent nerfs killed strong decks, but lead to a more narrow environment, not a wider one. Regardless of how OP weather and consume were/are, at least both could be played before the last patch, now just consume is tier 1 - and the introduced cards hardly get picked up as a deck theme.