Its really the feel of the xp you have. They were going for a smoother easier to drive system. If you wanted a tougher feeling drive system and less "sloppy" as you put it like a Gravely that is reserved for the base Outlaw or Outlaw Extreme. You lose the suspension, the smooth drives, and the power deck lift option paired with manual, but the Outlaw extreme is reserved more for my hardcore LCO's like you. Honestly when a lot of people hop on a Gravely 200 or Base Outlaw the touchy feeling on the hydros scare the crap out of them at first, expecially if they are used to the G2s or T6 Grasshopper drives or something.... I admit when the throttle is full and I just hop on one it shocks me after being on your mower. The xp has a more delayed response, so after you push the stick forward it takes a second for the full speed to hit more like the Hustler smoothtrak steering on a fastrak. Most of the guys that get it get used to the difference, I have one guy that runs all Gravely 252's and 152's, but got the xp for his personal use to piddle around on and do his place with. He said he likes the nice feel of it but claims if he put it on his crew the guys would tear up the nice feel of it so he just uses it personally. I gave him a base law to play around on and he agreed it felt more like the 252 did....
Its that difference in way the steering dampners are set up paired with the linkage and the type of tranny used.... You may try to get an extreme for a demo, I know there is a price difference down, but for you you would like it a lot better so it would be a little easier to trade down into for you...