I would like the option to have the Stomp A/B (aka DI) part of the parallel signal path to flow through the effects section (X/Mod/Delay/Reverb). In other words, I can choose whether to mix it back into the signal right after the stack section or all the way at the end of the chain. I definitely want the darker "dry" path to have delay/reverb. Otherwise, the delay/reverb will sound a bit thin.
Maybe even a third option of between X and Mod. That way you can post EQ the wet path in the X slot, which makes it easier to more naturally blend it with the "dry" path. Then you can put an EQ in stomp B, using the two EQ effects for a nice crossover type filter, so the two signals don't end up "fighting" where they'd otherwise overlap.
Or how about you just let us pick exactly where to mix them back together? like "After..." with a choice of C, D, Stack, X, Mod, Delay, or Reverb. Well, between Delay and Reverb probably is impossible given their interaction. so, C, D, Stack, X, Mod, or Delay/Reverb.
Parallel Path is a great idea and really hope it gets expanded upon.