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.
MPS has had in place hover capability since 1.5.2. But a lot of players hate it due to it being "op" or "lack of creative flight because they don't know how to use the tinker table to configure their MPS".
(Let's use the DW mod pack for our mods list to be used)?
Because angel blocks didn't exist the last time I relied on an IC2 jetpack, & if I'm building a mob farm drop tower, it is easy to pillar up 1 column, then pillar down the next using a slow-fall mechanic, much like holding down shift-s-right-click to bridge across.If you're building, why not drop down an angel block?
Shots fired.<snip>
IMHO, IC2 isn't even worth installing without GraviSuite.