Try it out because it makes for a different sound. Certain frequencies of the wah seem to more pronounced when I put it through the effects loop of my Traynor YCV50Blue.
Yeah, I use envelope filters and wahs infrequently, so i wanted to use my rack versions. Sadly, they sound like crap thru the loops so I have to go thru all the BS of setting up pedals to go straight in. Damn it!