Anyone with any deal should NOT be in Intermediate/Intro etc. RC Pro stipulates this pretty well.
I just got back into nitro this year after almost 8 yrs off, and run Open in RC Pro and Pro in MWNS and consistently run in the B-main. People that sandbag are a joke, and are doing themselves a huge disservice. There's a HUGE difference between people that can drive fast, and people that can drive fast while racing close. And they don't get that skill set while racing people much slower than themselves.