I agree with Crewell that some enemies should focus my downed party members. Feral enemies like gnolls, and maybe extremely intelligent/sadistic boss enemies (e.g., Gut, Ragzlin, Minthara). This would add tension to ~boring (newborn gnolls) and important (Absolute leaders) battles. Maybe with a taunting voice line as they attack my downed party member. That could be fun.

But every single goblin ignoring my tank to attack my downed squishy, please no. Like, I get that I can revive people basically for free. But it's annoying to do so. Having to worry about normal death saving throws and accidental AoE is enough.