Personally I love the fact its level 12 - I've been running a campaign as DM for friends and the whole world has level 12 as level cap for characters. Its a great balance for a lot of things because you can run your party into several glabrezu and still win, while at the same time not being forced to min-max and thus have some unique character builds and nobody having to be panicking to reach attributes of 20.
I also feel like people highly overrate feats and ASI compared to multiclassing and getting abilities from a second or third class. Besides that class abilities are often far more interesting to use than feats.
My 2 builds that I am looking forward to use (though Larian's homebrew might interfere):
Human 'wanderer' - Gloomstalker (3) / Bear Totem Barbarian (5) / Battle Master (4)
ST 18 / DX 16 / CO 10 / IN 12 / WS 14 / CH 9
Feats: I only took +2 ST and later on either resiliance, two weapon fighting or something else... depends on the mood as its only in the final stage
This character looks unoptimised because of the low constitution but its been the most fun build I've played in any game. Its a utility character (history, stealth, perception, althetics) that can be a beast when picking his fights and as long as he is raging he can also tank. Ranger gives him two weapon fighting (which also helps out with the longer wait for multi attacks) and fighter blind fighting.
The second build:
Half Elf 'sorcadin' - Oath Vengence of Vengane (6) / wild magic (6)
ST 16 / DX 14 / CO 14 / IN 8 / WS 9 / CH 16
Feats: War Caster / Meta Magic / ASI +2ST (or CH)
Blind fighting from Paladin.
Wild Magic aggressively used is such a fun way to play and can actually buff the character (please DM don't limit the surges, the class is balanced on them being triggered often and it doesn't harm the campaign). Paladin profits from additional spell slots for smites or castings of shield, but also many of the negative effects triggered by wild magic (like fire balls) suddenly become potent offensive weapons.
Both builds have several strategies for actions, bonus actions and reactions to play with and can be used in many ways. +5% up or down for individual stats or more feats can be easily outmatched at level 12 caps by just playing smartly. I've been running a lot of different NPCs because my palyers often play solo sessions, none of them are standard 'optimized' builds, but it never caused issues (keeping in mind I rarely run encounters based on CR under 'deadily'). On this level you can run wild with whatever you have fun with. I hope Larian gets these subclasses right
