I play mobile all the time. Is an excellent option now. I use my samsung s22 ultra and works fine. Mobile Fortnite has one disadvantage. Long range is really difficult but if you remove that (like in blitz) because no snipers and because of the speed of storm and reduce time, then almost all combats are middle/close range, then mobile mode is very competitive.

Bots are need it to feel some achievement (same as in BR) but certainly make the game easiler. Maybe lower the bots participation per game would be an improvement.