2. Some of them are hard crowd control (Heartstopper, Backbreaker).
Why would I ever use a melee weapon that doesn't have these? They're so much better than the others.
I'm starting to have an issue with abilities and effects that sound or seem powerful, even lethal, but have a very minor mechanical effect.
Heartstopper? Sounds like a high level ability that's a well guarded secret in some monastic order. Not something every level 1 soldier is doing all the time just because they have a hammer.
Backbreaker is just a free shove prone. Shoving prone should already be a part of Shove Action, which should be available whenever I need it. It's basic. Why can I only attempt to prone someone once per short rest and only if I have a weapon that gives me
Backbreaker?
Mobile shot is something that should be a character ability or a feat rather than attached to a bow. How does a Legolas style running shot match a brutish 8 Dex 20 Str Full Plate Fighter who just equipped a Bow because there was nothing close enough to smash?
And of course my old favourite: being drenched in acid gives you -2 AC for a few seconds, after which your armor and you(!) apparently regenerate.
I think they're just making a big mess trying to force these myriad "video game must have" mechanics into D&D.
WotC, please intervene.