I'll not express any opinion regarding improvements to the ride, but as one who has had to deal with tire issues while on the road a word of caution.

It is bad enough trying to replace a 315 (or even a 12.00) while on the road. If you are lucky you can get one. Luck being the key word here.

On two occasions when I have had to replace tires unexpectedly (once a 12.00 and once a 315) I was unable to get either size within a reasonable time (I'm talking days, if not weeks) I ended up getting the closest possible rolling diameter and juggling tires around putting the new replacement on the tag. I then ran those oddball sized tires (I cannot remember the sizes now) on my tag axle until I had to replace my tires. They have to be close because your ABS will not like different rolling diameters.

Once you have 365 tires on the steers you are screwed if you have a failure that requires replacement. Find out the availablity of 365 tires. Then consider what happens if one fails on the road. They look neat, they may have a ride that someone with a sensitive butt can describe as smoother, and having them puts you in big boy league. But it will not change the fact that any tire failure, anywhere on the coach once you have 365's on both the tag and steers puts you in a world of hurt. Have a plan if you upgrade as to what exactly you will do if you have a tire failure at any position on the coach.