Well I'll be darned, I tried to refresh my open "My Disney Experience "page and got an error. Clicking the bookmarked page this time got me back to the old site. Looks like it isn't just you! I will say it is being buggy as it had before; any time I click on the "My Reservations" where it shows I have 2 room and several dining ones, it goes to an error page, and some are blank. This is certainly not better than the new site!
I had no problems with the new site except the Online Check-In kept giving an error, so I used a link someone else provided and it worked. I hope they get it back up and linked to the "My Disney Experience" phone app. The app was said to have been updated yesterday, but my phone offered no update for it, even an uninstall and reinstall was no change. We arrive on the 1st and it would be nice to have it all functioning from my phone!
Quick update 10 minutes later: Funny, but with all the errors, I just shut down my browser (Chrome) and restarted it. The old website (still just this morning), but the log in was slightly different than I've ever seen, and it did go right to my reservations as it had NOT been doing with the old site. It seems like they have made some changes to the old site after all.