Finally, the long awaited (from my self at least) results of the mods:
The Tone Doctor of Houston, TX did an op amp upgrade, replaced a work filter cap, and performed a noise mod on my wah-plagued MP-2. Unfortunately I will have to track down a new chip to get the wah in order. But as long as I have a wah pedal, it's only window dressing. Here are my impressions:
1. The tone really opened up. The overly muddy bass frequencies were fixed. Now I can really chug when I palm mute without thudding even at the highest gain settings. Treble breakup is a lot more natural, though definitely still in the Marshall camp. The tone is no longer compressed like my other MP2 is at similar EQ variances. Even my darker sounding guitars really shine as well as the telecaster bastards that I normally use these days
2. With the noise mods, the noise gate is no longer getting heavy use, except for rhythm playing at the most extreme gains. It's like I am dealin with a whole new beast that I no longer have to fight against at times.
3. Clean channels have a little bit more sparkle. As I record R&B as well as my usual metal diet, this is also a very welcome result.
Overall I got exactly what I was looking for when I sought out the mods. I would recommend it if you do wish to go the same route. All thanks to Tone Doctor on this one.