Well, I have be using /e/ OS and I admit is quite good. You have interesting apps in the alternatives app stores while most of Play Store apps works on my PF3. There are a few that doesn’t work but are very few and it is not a problem.
The problems with screen (I think I have had bad lucky and the hardware is defective) are still there and that’s the big deal since I bought it, but the /e/ OS works better than stock OS. Now, the phone runs perfect, no issues founded (at the beggining I had a lot).