Dear Dutch, i donīt think you have a *real* problem here.
Neither you have to modify your amp.
If you find that you have too much gain, and would rather have "a light crunch" so your pedals are noticed, just do it.
You have both a drive pot and a footswitchable boost: you should lower them until you get the base sound you want.
I agree with you, once you have a lot of distortion, adding more of it up front may not change things much.