Making choices to complete all sector feats without wasting energy is the interesting challenge
yes. Sector 2 requires 14 battles to be won by Jedi, and there are 14 battles available. Okay. That's easy enough if you have 10 high level jedi (recovers stamina in 5 hours, recovers 2 battles worth of energy in 6 hours, so 2 full squads is enough). BUT you're also trying to get things done while spamming assists - no problem add General Kenobi - and also trying to get things done while winning battles with 0 tanks present.
Ooooo, now that gets trickier. Obviously JKL works well for that, so long as you have him in the lead, but then you can't use JKR lead + JML + JKL which is a popular blow 'em up team. In fact, you can't use JML at all. Nor GK. Arguably neither of those is the best jedi available, but both of them are in the top 5 or 6, and JML is certainly a strong contender for #2. You lose a lot when you can't use your faction's GL.
That's the kind of feat mixing and matching that gets my brain going. Obviously I **could** grind by doing all-jedi battles, but including tanks and worrying about the tankless feat later, but this provides me an opportunity to avoid grinding if I use clever tactics and have a well developed roster with lots of options for strong Jedi from which to choose.