You've done more than enough.
Scoring 78%+ is very good for Emond exams.
Wait for LSO to send you your mark breakdown. See what area you struggled with, and drill yourself as much as you can in that area for the next exam.
Because I grew up and lived in Toronto my entire life, did my undergrad at UofT, and wanted to get out of Toronto for once.
And I don't regret my choice at all, but I did find the teaching at UofT to be better compared to what I experienced in Ottawa. Now I have no idea how the UofT law professors compared to the Ottawa law professors because all I have is my undergrad experience.
FYI, read the LSO recruitment procedures for 2L. They identify your obligations as a student wishing to participate in OCIs....I believe one of those obligations is to inform all potential firms still considering you when you have accepted an offer. I'd take a look at those rules more specifically and, based on your original post I can tell you that the rules do apply to the region you worked in.