The mechanic of the IC2 jetpack in hover mode is great for aerial combat (such as ghast hunting) but not for building. Most flight options will either give you creative flight or a slow fall/glide, but not both. IC2's also has a limited height (something just short of the slime islands iirc) and a short duration before needing to recharge.
Thanks for chiming in, man. Appreciate it.
Interesting that you mention ghast hunting and IC2 jetpacks. I do find it very annoying to aim a bow-arrow, stay still in one place using the IC2 pack, in order to get a few accurate shots at that oversized crybaby. I've borrowed a fellow player;s thaumic harness, than suddenly it is a case of airborne nirvana. Simply Jetpacks' resonant backpack is close to that kind of gameplay mechanic.
The "slow fall" you speak of is not "slow enough" for doing practical things like building a stone steps in ravines, etc.. There is good reason for full mod capabilities of Morph mod being banned in servers. But until simply Jetpacks, we didn't have a tech mod that offered a semblance of pure "in place" hover, it seems.