Had a quick play with the mod and so far am enjoying it I like the modular idea allowing you to customise your armour to your liking and have a couple of suggestions for changes that I would like to see;
1. Would it be possible to add a sprint button for use with the leggings like what IC2 Quantum Armour has whereby if you change the config to say only use when the boost key is held down then you can sprint without going insanely fast. (Means I can sprint around holes without it going a bit crazy and throwing myself in)
2. I would like it if you could change the tinker table recipe to use something other than an emerald as realistically your change of mining one is insanely low and so whether or not you get one depends on your ability to find a village in which you have something to trade. (Maybe make it cost even a diamond block as with some of the worlds I have played in where I have had a lot of trouble finding villages getting started in this mod would be next to impossible)
3. As other people have said I would like to see some kind of free flying module that simulates creative flying however make it insanely expensive to make and also use a lot of power so you can only use it sparingly.
Other than that really do love the mod and am looking forward to seeing if you add more modules and what they are.
Edit: Oh and one quick question I installed the sprint assist on a pair of Power Armour Legs and set the speed boost and exhaustion compensation to max I assumed the exhaustion compensation would mitigate the amount of hunger I lost (at full 100% compensation so no hunger loss) yet I still lost all my hunger very quickly sprinting around am I mistaken about what the exhaustion compensation does or is it bugged.