For trials you are slightly less likely to hit your knees on a lower crown and for street / flatland it makes foot on crown tricks easier as you are able to put your foot on the tire too.
I found wheelwalks extremely hard with the stock 07 DX frame.
Once I shortened it, they were instantly very easy to learn.
Also, I don’t know if you were implying I ride street, but I don’t. Just Trials and some freestyle stuff I’m trying to learn like Gliding and one foot riding.
Sorry. I just read through your post again, I thought you reduced it by 2mm, now I see you reduced it to 2mm How much clearence did it have before you cut it down?