Let see if I understand you correctly. You would like to see a stereo effects return as well as stereo main outs? Would a stereo TRS output be enough or would you require dual XLR?

Given that the ML provides a portal to an existing pedal setup (that may include an EQ pedal), it may be overkill to include it on this product. Regardless, what would you consider to be a functional EQ for your purpose in this case?

Are you concerned about a potential MixingLink v2 with these options increasing in size considerably?