Why tow level ??? -- Is it important -- How to acheive

When I changed trucks to a 2014 Ram 2500 the 5r was 4.5" nose high, chucking drove me nuts. Pin box did not have any adjustment and the hitch was all the way down.
Bought a kit from Dexter for the torsion axels that raised the unit at the axels 2-5/8", that brought the RV very close to level. It's 1/4" to 1/2" nose high now, a little more pin weight and it would be dead level. Bed rail clearance is 5.5". Chucking almost gone except for the expansion joints on bridges and some of those concrete interstates.