I agree with you. I haven't update my flyme in about a year now (Updated from 4.5.7 (i think) to 5.1.6, which was a mistake...). Now if you ask me they started rolling out som updates with some good stuff but they screwed it all up with adding hot apps and stuff from chinese version of flyme and removing Google Mobile services (for the record, if you are following bugs section for flyme quite a lot of folks have problem installing google on their phones and when i got my phone a year and a half ago i had chinese version and i couldn't install google also, so i had to change to international (I'm not chinese but they didn't have international version of mx5 at the moment...)).
For the end, I like meizu mx5 but flyme is giving me sweet and bitter aftertaste...