Split screen frame rate issues

There are very severe frame rate issues! Some maps (Shatter) are just as unplayable as they were in Halo 4, but what’s even worse, maps that were working ok in the past now have frame issues as well! WTF?!

So is an urgent need to optimize this and as you say friend, now the maps were rather halo 4, have a falling brutal fps is not possible , and tell me also maps remastered not saved , please 343i fix this .