With respect, you are rong.
Lae'zel is a tank. Until HP bloat / AC reduction is corrected she, and not Gale, is the biggest threat.

Who are we going to use for that dexterity check? Shadowheart? I guess I could give up my stat boost or class specific feat to make myself a second class thief. But I don't really want a swiss army knife? Even with flexibility of 5th ed it makes sense to have a finesse character.

You missed the bit about more banters and the fact that this is putatively the continuation of 6 party game and not a mod on top a 4 party game.

Same with healing -- feats are precious. Why waste them on making a so so healer?