That bike looks like it grew up Downtown and looks rugged as hell. 10/10 would ride into battle. And just to add, I love that battleship grey more than your army green you had last year.
On my V2 Sweeper (identical geo) I swapped back and forth between ~80mm and ~100mm. You can definitely feel a difference. That said, I'm not too particular on things like head angle, so I mostly felt the difference in the height of the bars. If you're the kind of person who feels every millimetre of BB height or every fraction of a degree of head angle, it may make more of a difference to you.
I've seen it done online. From what I understand, it involves shortening the piston. Slightly more involved than dropping in some travel spacers and definitely voids the warranty, so I'm not too interested to try it myself.