The game has a good base. It didn't need to do much more frome nfs heat just be a new game add a few new stuff.
3 stars and not 5:
:Handling is tragic, major stepback from heat, don't see how anyone can think it has improved. Really needs updating.
:Restart of races has limits through the day. Depending on which setting you have you get more or less. I just don't see the point, I do like restarting in case I crash to make sure I win but I feel like it's making more frustration to not use them in case you need them for later and not get the wins that you want then.
I played heat for a serious amount of time, completed pretty much every achievement. Very rarely lost an online race. I know the game very well so I can definitely say unbound has a bit of updating to do yet.