Ayaka will make things wayyyyyy freaking easier, that's for sure.lots of peeps saying you dont need ayaka for the content and that shes overkill..
yet sooooo many times during annoying trials I wished my tilith could cast 2 things at once, and how that would have made my life about 500x easier
I think ayaka is worth that
Saying she is not a must have is idiotic, like, no shit. Every single 5* unit releasing from now on won't be a must have. Not Sakura, not Basch, not Lilla, not Lid, not Nichol. All of them have budget options that do a shitty but competent job.
The future meta defining units do what they are supposed to do so much better than the competition it's not even worth comparing. The banner as a whole is not the best, but rest assured, 90% aren't and won't ever be.
Might as well just pull on anniversary with this mentality, let's see how long you last after not pulling shit in those occasions.
That said, our goddess is coming. Best luck to y'all! Do what your conscience commands and hope for the best.