I see this question was asked quite awhile ago. I'm struggling with this exact issue. Wondering if anyone has come up with a solution since this was first asked?
Wow, an oldie from my pre-expert days! Ain't asked any questions in awhile. 🙂
There's no built-in workaround but you can use JS to strip your extra parameters before loading Munchkin, then only the simpler URL will be logged. Just like Marketo does with the mkt_tok query param.