There doesn't appear to be a Rocky IV: Ultimate Director's Cut listing to review on Google or RT, so I'll just drop it here ...
Only die hard fans are llikely to appreciate this edit and I can understand that but it's definitely superior to the original, all though I would've changed some of the music that remained and also deleted the "if he dies, he dies" remark, since it's a bit 'over the top' (outdated pun intended 😄)
I personally didn't like the speech at the end either (all though this version IS briefer and more realistic) ..and maybe they could've had less fans cheering Rocky, for the sake of realism. I think if Stallone could do it all over, he'd have staged the fight in Canada or maybe Sweden.
The best new line is definitely Rocky asking Paulie why he's wearing Adrian's ear muffs and him replying that they look better on him. Paulie always steals the show!