Splitscreen Halo 2/3/4

I was hoping with this latest patch you would address the issue of the splitscreen deathmatches and such for Halo 2 Anniversary edition, and Halo 3 and 4. The splitscreen are still not full screen like Halo 1, and the other 3 games are very stuttery and jiddery? im guessing this is from poor frame rates? Will you ever resolve this issue? Ive been waiting for an update which seems like forever and its seems to never be fixed. I just cant enjoy the game i paid 40 quid to have fun with it.

Thanks
Si