let you choose kitkat or lollipop? should i back to KK?

I have tablet come with 3.o and update to 3.1 for around one month, and i start to know why people not suggest at the first place. the system is quite not stable, it will crash and freeze some time . So i start to flash some custom rom like bliss and TeamEOS, it works nice for few days (hours) and the problem is back. So i thinking should i go back to kitkat? Anybody any suggest?

p.s. i Flash bliss and teamEOS with TK full Gapps