The DynoMax chassis is the best in the market and doesn't need any add on "fixes".
First thing to do is verify correct tire pressure. CC recommended a tire pressure of 120 psi for the front and 110 for the rear, this was/is a cover your assets thing. You really should weigh the coach loaded like you will normally travel and then adjust the tire pressure accordingly. Next is ride height. Make sure the ride height is correct as it can affect steering.
A 4 wheel alignment could be done if the above doesn't correct the problem but I think ivylog has some good ideas for you to try before you go throwing money at a problem that you really don't have.
The 40ft Inspire is a very nice coach, just spend some time with it