If they didn't do body customization the first time there's no reason to assume they will the second time...
There are plenty of things that had not been there in DA2, I'd rather not use it as an example.
As for the OP - there's always a point where quality turns into quantity.
It's 8 f-!ng armor models and 4 VAs per 1(one) player character. Wanna have those? Then brace for the impact and get ready to have little to none unique armor sets, less hair options, less lines to voice, huge lore-holes (because no, there's no way Dalish elvQuiz can exist in the world of the 'Masked Empire'), sense-holes (Dalish Elf asking 'Who's Mythal?' and not understanding elvhen) etc. Also, don't forget about the race unimportance and lack of reactivity (minor dialogue options at best). Basically everyone suffers from that 'variety'.
DA4 (as we might suppose from the last scene) is going to have big issues as is, because 'non-mage PC in Tevinter' sounds bad enough already. The story should sensibly vary according to that aspect, if not we'll get MageHawke 2.0.