I've recently started playing Azur Lane too, since the English beta showed up. I mean, no real reason NOT to, now.
I'm having fun with it for the moment, but I'm not sure if this will interest me long term. Beyond collecting them all, and beating the maps, I'm not seeing much of a game loop that'd keep me entertained and coming back over and over unlike some games I've played. I'm already on 'hit auto and let them play by themselves' for some things.
But then I'm on year 3 with Granblue Fantasy, so who knows? If they trickle out enough new stuff to keep increasing that 'get them all' urge, I'll be OK I think.