advice needed: downgrade from CM11 to 4.1.2 topic

Hi,

i had CM 11 for a while but recently the bugs get worse then less. In the moment i cant make any call for example.
I tried Sammys 4.3, but the experience was very bad too. Pretty buggy, some apps wont work...and slow like hell.

So im thinking of going back to the latest 4.1.2 sammy rom.

I lost a bit the overview about efs and all this stuff.

Is there any problem to expect doing this? What was the latest or best version of 4.1.2?

Thanks