I can think of several ways to make this problem better:
1) Make sectors optional. People who like them can use them, people who don't aren't penalized.
2) Flesh out the sector control options. Allow the player to modify the generic build scripts associated with each sector focus in game.
3) Improve the sector AI
4) Eliminate sectors entirely. Replace them with planetary build automations (for those players who don't want the micro burden of manual planet development), and introduce a corruption mechanic based on distance from capital to reflect the negative effect of "non-coreness" on production.
1) Make sectors optional. People who like them can use them, people who don't aren't penalized.
2) Flesh out the sector control options. Allow the player to modify the generic build scripts associated with each sector focus in game.
3) Improve the sector AI
4) Eliminate sectors entirely. Replace them with planetary build automations (for those players who don't want the micro burden of manual planet development), and introduce a corruption mechanic based on distance from capital to reflect the negative effect of "non-coreness" on production.