Will Cù alter be rewrote soon?

Ah, do you mean like his writeup or the newly added lore section we intend to fill in on the new profiles?

We tend to coincide new writeups with any upcoming summoning banners when they are relevant. We might update his writeup for the Chaldea Boys banner that will arrive early March. It's more than likely than the other featured servants (excepting the new servant) considering his is the oldest.

Hi Crash dude! Thanks for checking in - we do have plans to update his writeup in March since he features in Chaldea Boys 2019. Look forward to it!