Alright, at this point they're just stalling and dragging it out before we get to the actual play.
This chapter is only "stalling" if you assume that the actual performance of the play needs to be the central event in resolving the story's conflict. Some important things do get done in this chapter, most notably, of course, the "no kisses for Touko" scene on the rooftop, where Yuu puts some (but by no means all) important cards on the table concerning how deeply she cares for Touko, but there's also the confrontation between Touko and Sayaka, where Sayaka definitively declares herself to be a member of the "what Touko needs, not what she wants" party.
Actually "confrontation" is exactly the wrong word for what happens in that scene--it literally means "to go face to face with someone," but the two of them never directly face each other in that scene; Sayaka mostly is talking to Touko's back. Then, after Yuu forces Touko to look right at her while she says her piece on the rooftop, onstage Touko says, "Let's do this," and rather tentatively turns back toward her friend. Excellent staging and use of body language in this chapter.
There's still important work to be done, and the play itself may be the vehicle or catalyst for some or all of it--Touko needs to be able to say, "I want Yuu to love me back," and Yuu needs to be able to say, "I love Touko," first to herself and then to Touko. I want all that to happen, but I'd prefer to see it unfold at a slower pace--as things have been happening all along*-- if the alternative is rushing through it.
*Except for Touko's initial confession to Yuu--that was a lightning strike out of a clear blue sky.