WOL Story Consequence mission 12A Haven's Fall

I thought getting 10 gas was a bug but i heard its intentional if you pick planetary, otherwise you just get 6 gas. I think the logic was it was unfair for the players that picked planetary because gas mules cant gather from auto refineries. Anyways feels weird to not be burning the colonists. I heard there's a boss monster that comes out if the timer goes to 0. I didn't know that until after I finished the campaign :( Also picking this mission or safe haven will affect some missions in HOTS and LOTV. Idk the specifics.