I have to admit, I was rooting for Heartseed during that scene. Inaba thinks she's so smart, but like he said, she's just isolating herself in a way that she made herself believe would keep him from interfering. But he makes the rules, so he can change them whenever he likes. Moreover, like he said, she's hiding herself in a "room" anyway, so he doesn't really have to change any rules. Inaba staying away from the other four isn't going to make things any better. In fact, it's more likely to make the other ones lash out trying to help her. Even Yui was willing to listen to them every once in a while. Inaba just shuts everything out and tries to go into full zen mode.

In the end, she's hurting herself the most, because she's so socially isolated in the first place. No wonder she wants to maintain the status quo, it's all she has.

The only problem I have is why she was so insistent on pushing Iori and Taichi together in the first place, particularly if she wants him so badly. I get that Inaba felt Iori was suffering and would finally have a shot at happiness if Iori had someone as selfless as Taichi after all she's gone through...but Taichi and Iori would have had the, "You are Iori" conversation anyway, so she would have been fine.