First of all, I like your concept for the map, and I appreciate the effort you put into making it. However, I am very skeptical about the features you mention.
As for the trigger blocks, do you mean blocks that perform a certain action when you touch them? I'm afraid that would take a lot of work from my side, especially now that I am working on the online multiplayer. Making action blocks would be close enough to making a new Garry's Mod (I mean, it would be cool, but is far from my currently set goals).
Making adjustable per-map gravity and other options has been mentioned before. So far, I avoided adding it, because it would cause uneven player experience. When you get used to a certain gravity, suddenly changing gravity throws players out of the game expertise they have gained by habit, and this frustrates them.
I'm sorry for not being much help, but please undestand it's important for me to consider the work/gain ratio for any proposed features. I like your suggestions and wish I could immediately get them done.