The "entitlement" of reviewers is, quite often (I would say 50/50), a result of the authors' response. I have reviewed several papers where authors responded to fair comments by dismissing the reviewers and trying to make him feel dumb. That invariably ends up in reviewers not changing / lowering their rating.

Also, PhD students can be good reviewers.

Since there is a discussion period, not having access to the initial reviews would only be a waste of time. As a reviewer, you would re-write arguments from your review, which could have simply been read from the initial review.

There is an official discussion period between reviewers and AC starting on the 31st of January. It would be weird not to know other reviewers ratings. It would be unprecedented, as it was the case for, at least, the last three years.

Possible with a good rebuttal and a little bit of luck that the reviewers are willing to change their mind. But borderline suggest that their opinion is not set in stone, so not a bad sign, and the accept will point them in that direction.