This one could have done without the unexpected encounter of those three gentlemen, well Thomas was needed, but the other two weren't.
I'm not mad from this being added in at the last moment, but I think it could have ended off with her presenting the evidence and successfully ending the engagement, with a little epilogue at the end, like a scene of the king passing judgement upon the first prince and stepsister, a couple of days later or even the next day, after the graduation. Then if this was turned into a series, then it would be a good choice to reveal the love candidates for her hand in marriage, after the graduation, or a few days later, at that. But either way I still like this one, not a favorite as it's just the same old situation, maybe a bit out of the formula, but it's not bad either.