so, i don't know what you have planned for 2.2, but here are some suggestions:
The Stars Align bumped up to 40 planets. the NR and IR would would start with 7 planets each, but very few units. their fighting in north core. PA starts with 3 planets, but with no one around them and plenty of space to expand. Ardus Kaine would give you multiple missions for expansion to gain Heroes, Reaper(stolen by a pirate, that being why he wouldn't start with it in the beginning) and planets for corporations and more units. non-playable factions would be a 2 planets zsinj(with just himself, 1 other hero, 4 ground troops, poor industrial base, and 5 ships.), and Maldrood(1 planet, Centares, just Truetan and 2 CCVSDs.). this would allow a simulation of Pentastar Alignment growth and power increase. don't know what your plans are for this, but this is an idea.
Crimson Empire: bump up to number of planets as in Shadow Hand. New units: Pentastar SSD[Reaper(basically a non-buildable executor unit)]
Orinda Campaign: 30ish planets, Pellaeon on Reaper, starts with 2 Bellators(Megador and Dominion).
maybe a option in HFZ for the NR/IR alliance to build Razor's kiss, though that would be really weird. maybe give the IR splinter a chance to do it as well. also, give the IR some grounds troops on Kuat(unless already fixed).
one of the era 4 campaign should have the fall of the Maldrood simulated.
a EoTH origins would be a nice smaller GC(though probably not till 2.3 or later)
Megador and dominion show up in Crimson Empire/Imperial reunification for Zero command and IR for Orinda and era 5.
that is mostly it that i have right now. might have more later on
just suggestions, do with them as you will.
i really appreciate all the time and effort the team puts into this mod