Opengapps 32 bit have some pet issues... Around in pico version! Has anyone tried nano version of it?
Also you can disable setup wizard of gapps but typing a command whole in twrp.. It had been mentioned in the aim rom thread! Use the search button, you'll get it.. And use that command to get rid of the setup..
About the lag, i am not sure if the live display is working now on oreo, however, you should turn it off as it causes a lot of lags.. In my personal usage i never found any 32 bit lagging..
I tried lineage, aim rom both.. They would have become better now, as i used them when they were absolutely new... I am sticking to invicta right now as my dad uses the phone now and also camera is still buggy on oreo!
Lineage is total stock and hence good performance... Ram availability.. Aim rom gives a very nice ui.. Along with good customizations..
i think we should stick to 32bit.. Right now.. 64bit still needs a bit of work! But that's just my opinion..