I like how Recon in Halo 4 is actually Halo 3's default control scheme. Fishstick is Call of Duty's control scheme, which is sad unless it's not from CoD. Sadly, sprint makes Recon unfit for Halo 4 unless it's removed.
What do you mean "unfit"? I could get used to the controls very easily, just like how I could get used again to the default. It just switches 2, 3 buttons and that's it.
I wish that armor ability was X, swap nades was LB, and sprint was moved to D-Pad up, but it's still solid. I use Recon in Reach, 4, and 5, so that there's little to no change between the three of them and Halo 3.