New feature? filters per VTS rather than to whole encode?

Would it be possible to include a feature to use filters on a VTS set rather than on the whole encode? As an example, I have a movie here that I'd like to use undot().deen() but only on the extras (because the original extras look like crap to start with..) The main movie however, looks fine after encoding so I don't want to put in the extra time. I know I could do this with RBOpt, but the process is time consuming.. Would this be an easy addition? Thanks

it really isn't that time consuming -- just add undot().deen() in the filter editor, run prepare stage, then use rb-opt to remove the proper avisynth line from the main VTS. doesn't take but a sec -- certainly faster than adding the line to all the extras VTS's.

or use a batch text editor.Find and remove the unrequired lines.