there are some minor problems with PA roms. Nothing serious though.
LG will be releasing kitkat in some time (a month?), so there will be more roms based on KK.
For now You could choose between PA, CM11 (and roms based on), some slim kitkats, and there are a lot of stock based roms and roms ported from G Flex. I would say not bad at all. Go and check it out in Development sub forums.
Stock rom is also not bad - sure it is loaded with some bloatware but better than Glaxy's for sure
abre tu mente