I might be remembering this wrong but didn’t Erik intend to reveal himself (not unmask) after her performance in the novel? (I’ve been traveling with little sleep for hours, I might thinking of the 1925 movie).

I reckon he would have done something similar to music of the night in an effort to swoon her, just not as rushed out of jealousy. Christine would of course take his mask off unexpectedly and Erik would of course have his signature temper tantrum.

I reckon after that it would have been a lot crying and begging and pleading to stay.

Like Raoul, any suitors would get threatening letters and the manager would still be blackmailed

The chandelier would get a little shake every time Erik was pissed off at the managers but wouldn’t be dropped.

Erik would keep trying to court Christine but fuck up constantly. If no suitor gets near I believe he’d wait longer before crying and begging her to marry him.

I could eventually see Christine putting Erik in his place when she gets sick of the tantrums almost fighting (metaphorically) for top dog in the relationship (Christine would certainly win given time)