Okay, here we go. WALL OF TEXT REMOVED!
My opinion. Pretty much I have played some 3, 3.5, and 4th. I played 1st and 2nd edition a lot. 5th seems to take 2nd edition and take the better parts of the other editions and combined them. Everything seems to be better and faster. Will it be better then Pathfinder, I say yes. The gaming community as a whole might be different opinion. =)