I got to see Second Son in action last night at a friend's house, and I'll start by saying that I'm really looking forward to playing it myself. I appreciate that you (OP) focused on how much fun the game is rather than how good the graphics or story are.
However, to me it looked somewhat light on content, and the variety of different powers didn't seem to add much depth to the combat. The different powers all looked functionally similar, with each offering its own take on bolts and rockets. The old "sniper" powers (zoom & slowdown for bolts) were exclusive to Neon. Grenades, shields, blasts were all apparently absent. InFamous 2 had four different special moves, while I only saw three in Second Son. In short, while inFamous 2 had one fully fleshed-out set of powers with two different flavors, Second Son has multiple power sets whose combined options are less fully developed.
The one obvious major improvement was in movement options, which were handled very well, and I like that they are now useful in battle as a sort of dodge.
My observations are supported by the comments of another friend who recently completed the game, who had this to say: "It wasn't terrible or anything, I just can't justify paying 60 bucks for it. 7 hours long, 4 enemy types throughout, only 2 real bosses. The power variety isn't really there, just different effects on the same powers. I could type a novel comparing this to inFamous 2."
Still gonna play it, I like me some inFamous.
