Hi bwcarp I just took possession of a 2015 Flagstaff 30wikss V-lite. This is the same floor plan as the 3025. You don't have to cross the chains as they are shorter in length than than in the past and will not drag on the pavement. I have 22 1/2 " from the top of the ball to the ground with the tt hooked up to the tv. The answer to your second question would be no!!!!
I would not alter how the chains are hooked to the tt. If you do you will be liable for that engineering changes you make.
The lawyers rule and we droll.
If the tt were to become uncoupled from the tv and the chains broke free form the tt where you attached them and the tt injurers or kills someone you may go to jail.
This happened several years ago in my home town and he went to jail for several years for manslaughter.
Hope this helps Tim