1- if you feel that current firmware is buggy. you can opt for global beta firmware as it have been optimised. (only issue is with gesture wakeup which can be solved if you select english(us) as your language option and reboot.)
2- the stable and improved indian firmware version is under testing phase hence you shall expect it to come by jan end.
3- for custom rom ultrametric have already told you .
4- the flyme 5 for m2 would be make it's initial beta phase in april.

all your question are thereby answered!
thank you

in chinese last of feb or march....

Hi, you can use global firmware for Meizu M2; can you please tell what bugs are you facing ?

Factory reset your device and then upgrade to Global firmware . After upgrading to the latest firmware make sure to factory reset once again .
To download latest (global)firmware for your device , head over here - http://www.flymeos.com/firmwarelist?modelId=18&type=1

Make sure to read  and follow the instruction provided ,"  [Check update procedures and notes] "which is located below the download button .
video tutorial -  https://youtu.be/8ewa_LOxHkU

Sorry for your experience but this is 1st time release wait for some days...and also flyme 5 jsut release for mx 5 not aviable in meizu m2 mini...Thnk you.

and to get flyme 5 wait some more day.

1 st of all very sorry that this type of problem ..please write down your problem in bugs and feedback section.and you know that android is community based language so if you want to flash your phone with cyanogenmod no problem but there also number of bugs.miui,flyme,even cm custom rom soo never provide full stable like stock..Wait flyme problem solve in some day.