Well sounds like you effectively completely crushed what was something really exciting for her, and ruined what could have been a great trip next month for her family, especially since April can be a great time to go.
I mean, yes, I get that you were trying to "help", but... seriously. You went a bit overboard don't you think? Especially since most of the those things are probably things she needed to know nothing about - Magic Bands, park hopping,
MDE etc... those aren't necessary. I think anyone, in that situation, yes, can point out that things have changed, but a) don't point out things that aren't absolutely necessary b) don't go on and on about every little thing that's changed, maybe just touch on a couple key points c) point out all the positive things that have changed!