I burned out on it a few months ago. The combination of the skill-up system turning an entire weekend of SSP farming into absolutely nothing, REM never giving me anything I need and still being full of 3-star garbage, and the mind-numbingly boring grind that is +eggs sucked all the fun out of it. New descends don't pull me back because I find the rewards extremely lackluster compared to the olders ones like Two Heroes, Hera, Hera-Is, Valkyrie, Satan, Goemon, etc. And I'm still not a fan of shit like Twinlits being so heavy on the RNG; the only new weekly dungeon I think is well-designed is Keeper of the Gold.
I still log in daily, but sometimes I go a whole week without using any stamina. I collect my free stones, and piss them all away on the REM whenever there's a godfest with 2-3 things I could use in it. Maybe if I ever actuallygotany of those things I'd play more regularly again, but meh...
Edit: I looked at Brave Frontier when it was new and again when the thread here started up, but I don't know what it is... something about the art in it just pushes me away from giving it a shot. And not being able to reroll without a rooted device. I'll probably install it eventually and regret not doing so six months ago.