1. Not really an improvement, but the experience is smooth. You'll get some RAM management issues, though.Hey,
I don't root a phone since like 7 years ago. In the "begging" it was a kinda easy process, but the roms had a lot of bugs and they didn't really make the phone faster (I was using a galaxy Gio, anyway).
My questions are:
Will I notice a speed improvement with this rom?
Will it be better in my battery?
Will I be able to play pubg in higher settings?
Is this a good rom for daily and intense use?
Thank you in advance
2. Yes, definitely. With no bloatware running in the background you'll be able to get to the end of the day with 30% (YMMV).
3. Yes, with some tweaks (PUB GFX+ Tool).
4. If "intense use" means doing everything on your phone, then no. Remember that the Zenfone 3 is mid range from 2016, and it shows. The ROM can't give you more RAM or a better SoC.