Not really sure why Acala is so undervalued (her base form is pretty bad I guess), but AW, she becomes useful way before you become a spacewhale and hitting 2m caps... nor should you really be looking to replace Uriel with her (Uriel's constant triples are really useful on their own). In fact, as soon as you starts to near the 1m caps and looking at exceed, an AW acala looks more and more interesting, on top of that, she's pretty fast and strong on her own (her self buff is almost always on). IMO, she makes a good third in a party after Uriel and Svarog (against debuff resistant content). Sure, not a top tier hime until you become a space whale, but certainly plenty useful way before that.

If you have eyes, and don't have anything else more pressing to use them on, I'd AW her... she'll be helpful in wind tower for sure.