Disagree. The display of the s5 is better all around. I had no problems with it in the sun.
I returned my s5 and went back to my 5s, a while back. I couldn't deal with the random problems and lag the phone had... That and 16gb wasn't enough. The phone had so much potential though, and wasn't as bad as you make it out to be. The s5 was superior on many fronts, the battery being a big one.
Guess if it was that good you would of kept it, random problems and lag, sounds familiar.
Potential is a bit late for a $800 plus phone, maybe next years S6.
Sounds like i made it out to be for the same problems you had.
Battery is good although takes so long to charge.