Alright, I gotta say I love the maps and the concepts of the entire map pack. As someone who had Heros as their first 3d Sonic game I could say you captured the feel of the game perfectly in your level design. What keeps me from saying that in full though is your lack of a couple things.
Seeing as MoTDSpork has already released a couple things that are heroes related (not on the mb), as much as I hate to admit it, those versions are actually far superior to what was released here and I was somewhat disapointed when I didn't get what those offered. Knuckles' punch ability has been removed as has Omega's flamethrower, all characters can spindash (even Big, which REALLY looks weird considering he doesn't have a spin animation) and Tails has no ring bombs, not only that but Sonic could really have had a rocket accel instead of a spindash which only required a couple fixes from the JeckDuo wad.
Another thing is that the abilities themselves aren't the same as the original (which let me just say that I'm not saying that that's a bad thing), the way you designed the levels is perfectly fine at accomodating that, however this presents at least one major issue when using the speed character: they're completely useless. They have no advantages in terms of speed, the sections that "require" the homing attack can easily be bypassed by the Fly and Power characters, and the game doesn't force you to switch between the 3 so the team mechanic really feels more like an afterthought. Heck, the level design, while still maintaining a team aspect, is still rather centered around all three characters getting around individually.
For all this map pack does right and did EXTREMELY well when it came out, the team mechanic doesn't work as well as I had hoped. the new animations for Omega look awesome, even if the sprites can look a bit flat sometimes, but a lot of things just stand out to me and are a little disapointing when it comes down to it. I don't know how hard it would be to do but making the fly characters only fly to a specific height and be more accomodating for horizontal movement in the air while still having a limit to how far you can go like the game would be for the best. I've already made a glide that works like Heroes' glide and it's not even that hard to make, it's just making the animations work with it that's the main issue.
Overall, great map pack, I would like to see the problems I've had fixed, but it's still pretty dang awesome to see someone put all this effort into making something like this!