1420 Cub Cadet

is this normal for these machines? is there somthing that can be done to improve it? Would changing pullies to increase blade tip speed help?

Last sharpening of blades I put um in the vice and bent the back up to give them more lift, that helped at least it blows the clippings out better, but still looks like heck behind the tractor.
I have a Homelite T16 with a 48" deck and a blowed up Briggs it cut like a champ even in 8-10" tall grass, was thinking bout retro fittin that deck under the 1420. also thinkin bout gettin a Zero Turn type mower and tradin off the 1420 till I found out it aint worth much even tho it is like new. the 1420 I think is about a 1991 model.