The 'enhanced' human soldier comes out of thin air with limited explanation.
Apparently T800's can grow to become happy old family men who's into (not lying here) carpeting. O and dogs now apparently like terminators since Arnie pets his dog a couple of times.
Skynet never happened because of some alternate reality concoction which immediately renders the occurrences of T1 and T2 pointless. The addition of Sarah Connor now feels more of a box office draw rather than actually add weight to the story cause 'who the f* is Sarah Connor'.
Biggest complaint I have is that the story and characters are shallow. T2 was about a machine - human interaction and you could feel a bonding between Arnie and John during that movie. None of that here.
Go see it by all means but if your expectations are T2-level, you'll be severely disappointed
Spoilers contained:
So the enhanced soldier is fully explained by the end of the film, She was rescued by the future rebel leader and after being injured during battle was augmented. The T800 getting old is admittedly odd but you could argue that its a infiltration unit so changed itself to blend in I dunno about that one.
Skynet does not exist because Sarah & John destroyed it in T2 therefore making it non existent in this film which is set after T2.
I admit the machine/Human interaction is not there this time but there is a obvious bond between the soldier and target.
That again is made more obvious by the end.
There is also a inkling of a respect between Sarah and the T800 which I think could of been fleshed out a little.
The only thing that does concern me somewhat is the ending.
It felt left open for another sequel which I think would be back down the rabbit hole.
But in a nut shell its just a re-telling of T2 really.
Its basically the same formula but with some throw backs to T2.
But nobody should ever expect anything to beat T2, It wont that film was nigh on perfect.