Have you done or are you aware of the CHF (cheap handling fix)? The chf involves moving bolts on the front and rear stock swaybars, it is relatively easy to do with fairly common tools and takes about 1-2 hours to complete. The chf makes a dramatic difference in the handling of your coach, especially around semi's, and it's free to do.
The next two improvements would be a steering stabilizer such as the Safe T Plus and or a rear track bar.
I would start with the chf since it's free, try it, see how you like it, and go from there. The chf has been done on hundreds of coaches on the F-53 chassis and many people are satisfied with just doing that. There are several videos on YouTube that show the chf. Hope this is helpful to you. If you have more questions please ask, someone will be more than happy to assist!
P.S. For more ideas and mods to your coach look at Jerry's Hurricane mods under the Modifications section. Over 80 pages of great things to do on Hurricane and Windsport coaches!