But she WAS trying to come up with a plan with them. She opened it up to the floor. Buffy has always came up with the initial plan which they build around. The characters were just written as if they’d never experienced this before, which was understandable for the potentials but not the scoobies
Her plans sucked compared to earlier seasons. Other than dealing with Jonathan it seemed to be try what failed even harder and hope for the best rather than true strategy. About everything she accomplished was handed to her (for example, discovers the scythe because Caleb is digging it up for no reason, when Buffy goes there he shoves over the barrel hiding the entrance, it should've had a bow on it).
Furthermore, I don't like her attitude. I can think of 3x right away that Buffy's life was saved by her friends in season 1 alone, and I'm sure I'd think of more in that season if I paused to do so. They continued to save her life through the seasons. (Sure, she saved their lives as well, but they were a team, friends, not her flunkies to be bossed around, and the few times she treated them that way in earlier seasons she regretted it because she was wrong.) AND they made the plans with her, sometimes even making the plans she went with. And she acknowledges this repeatedly as well (particularly in her season 5 speech to the Watchers). But then in season 7 Buffy says she carried them all this time? To hell with her.