I "upgraded" from OP3 to OP5. Definitely happy with the device. No Display issue for me.
Things I like and notice that are better on the OP5 vs OP3:
- Camera
- Overall Phone performance
- Battery life (Yes, comparing 3300 vs 3000)
- WiFi has no issue of random disconnections
- Bluetooth through my car's Bluetooth kit (Parrot CK3001) sounds a lot louder than than it did on the OP3 on phone calls.
- No random reboots
- Vibration is a lot stronger for sure. especially when the phone is in either my side or back pocket
- Vibration intensity option in the settings menu.
Things I liked and noticed that are better on the OP3 vs OP5:
- Display richness. No matter how I configure my OP5 display settings, I cant get it to be as warm and as rich as the OP3 for some reason. Either looks too warm or too cool.
- (EDIT) forgot to mention, adaptive display is faster to "adapt" to light changes on the OP3. On the OP5 there's a bit of a delay, especially when taking it out of my pocket when in the bright sun light.
To me, the camera and battery were definitely worth the upgrade. But also because I was able to sell my OP3 at a fairly good price to justify spending the extra for the OP5. overall, very happy with the purchase.
Good luck and hope that helps.