Some input after using MIUI for several hours (phone is not in my possession but rather a phone I manage for my roommate)
A few apps would FC after being installed until rebooted
example: Install Gmail, open Gmail = Gmail FC.....Reboot... Everything works great (no FC)
This was pretty consistent across a couple Google Apps. Needed several reboots
Using the Inbuilt browser, if you're on the youtube site and try to play a video, browser will FC (with and without the youtube app installed)... This happened a couple of times... Didn't seem to be a problem with Chrome
Permissions manager.... is it normal to ask what seems like 10 times for a "ARE YOU SURE YOU WANT TO GIVE THIS WHATEVER PERMISSION"? I found that a bit bonkers
Other than that - the ROM was very smooth, slick, always love MIUI's themeing ability. Good work!