Baha, these comments sections are the greatest entertainment.
Let's go through the complaints:
- Too much ecchi
- MC shouldn't treat her past self as a different person
- MC shouldn't be the character she was introduced as in the first episode.
The new thoughtful comments about the MC's personality would be fine, if we didn't get the first chapter we got. Where did you get the sense, in the pining woman who went to go masturbate in a children's park, that she was in any way a confident person, rather than desperate.
Everyone seems to have built up their own idea of where the story "should" go, instead of seeing what the mangaka has clearly laid out in front of us all. Either you assume that we have some information on the time travelling situation that the MC doesn't have, or you want the character to be someone other than who she is.
Your stories are intriguing, and thoughtful, for sure, and would probably be nice to read, but you really need to stop projecting.
I'd be more uncomfortable with the molesting if Saki-senpai ever made any effort to avoid it.
She meets a woman who saves her, but immediately kisses her as a "reward"
She follows that woman into a bathroom alone
She invites that woman out to the movies
She tells that woman about her acting failure and accepts her help.
She invites that woman ... to her school and wants to introduce her to the rest of her club members.
MC isn't forcing her senpai into any of these situations, so it's not exactly grooming. There's something about MC that senpai just ...wants.