is Loki going to powercreep Brave Veronica?

We don't know her stats yet, but I highly doubt it, especially for hard PvE content. Veronica's weapon is much more convinient (and annoying) and Thökk's "Gravity Ploy" only affects ranged units with lower HP than her; which probably won't be that easy to use against Infernal/Abyssal enemies.

Edit: Veronica is also much better for low investment. Loki would need to inherit Dazzling Staff if you want to use Thökk without being counterattacked.

She won't, nothing's as broken as Brave Veronica. Thokk is only Gravity Ploy effective against ranged units which isn't that impressive unlike Veronica's all-stats buff and debuff.

Lolno

Several easy reasons:
- she doesn't ride a horse
- she doesn't have Peshkatz effect
- more a matter of praxis than theory: a lot of people won't have dazzling staff to give her

Nope. Loki's weapon has built-in Wrathful Staff, and no Dazzling staff naturally on her. This means it'll be hard for people to have the feared WrazzleDazzle combo on her (Dazzling Staff has much more limited access than Wrathful). You can also notice that all the cavalry healers are much higher on the tier lists than the infantry ones, and that's presumably for a good reason. And finally, she don't give those insane debuff/buffs that let units melt through anything.

Oh, and her Gravity Ploy is pretty selective in what it hits. I really want her in Arena though for immobilizing all these freaking Reinhardts and Ninos >_>