I will go with more powerful base cards. Sure as Demolisher and Rhymer but not more powerful Combos.I personally think it is. Maybe not "easy", but definitely more straight forward with more powerful combos.
Right now there are many devastating combinations that Rebels have that Imperials have some issues with combating. It will be hard for an Imperial list to be an All Comers list because they have many "Silver Bullet" type of ships/titles. The rebels have a vase terms array of defensive capabilities and extremely strong offensive capabilities that is synergistic with the rest of the fleet.
Sure, more powerful base "cards". Combos might have been the wrong word, since combos by nature are more complex and thus, not easier to play or understand. So by that nature, I think Imperials are "easier" to get into.
