Aggressive trail riding is more work with the high Boss seats, but once you get a solid feel for it you actually feel a lot more in control. I have ridden other Vipers with the stock seats after 8K miles on the Boss seat and I tell ya I now prefer the Boss even for trail riding. Yes you have to hang your body weight as far off the inside of the sled and as low as you can get while using outside foot pressure to fine tune the tightness of the turn. But the boss seat takes the work out of standing up.
Now as far as boondocking and hill climbing, the Boss seat is leaps and bounds ahead of the stock seat even if you use a seat riser. Of course for real off-trail riding you aren't sitting down at all because if you do sit down you won't be for long

The sloped back of the seat is very important for switching sides as it allows your feet clearance to pass thru whereas the stock seat likes to catch your boot on the way.