I've also noticed poor ram management. On my redmi note 3 pro. There's less free ram. And after 4-5 days of use I can't get more then 450mb (out of 2gb). Even after reboot it ups to 600-650. Not 800-900 when you first time flash the rom. And as I said it doesn't affect the phone for a few days but after some time there's not much free ram and apps get reloaded still.