My IMP base can defend low lovel buffed jets, no problem. With high level buffed jets (I can guess by how easy and fast they maul down turrets, GR troops and anything on their way) back by multiple healships - they are unstoppable. If Kessen got my SC, easily 2 star or hundie even. Even if Kessen missed, they were strong enough to get at least one star. (My RFTs have L9 skin, and rodian L4)
On attack, my L5 skin jumps can take on bases with lower level skin turrets and GR troops, no problem. Against base with max skin level, L5 skin jumps seem to just melt, faster than my L4 T5s can heal them. I can get 1-2 star, with air, but not hundies. Certainly not as easy as the OP made it sound like. I am talking about rebel bases on Tat, and some on Hoth.
So it’s not that the jumps/jets that are over powered, sometimes it’s the mismatch in armory level.
The game experience is different for each player, depending on their match making pool and armory equipment level.
I am willing to bet that rebels with good Kessen sniping skills and high level (L9-10) buffed jets would have absolutely no issue with any/most IMP bases, and similarly for IMP players with L10 skinned Vader, good attack skill, and high level jumps (L9-10).
For the average player with L4-5 buffed jumps (L2-3 buffed jets), attacking fully equipped base with high armory level is still a challenge. Lots of IMP players, even with buffed jumps, have problem taking on rebel bases on Tat.