Yeah, I've never had that problem with Touring Plans and I've been using them for a long time.
Then I'd say you got lucky. For example, until April 4, they predicted Cinco de Mayo to produce LEVEL 9 crowds. That is NUTS. There's no way that would happen. Even I knew that, and knew something was off. So, on April 4, I got an email with the dates I'd been tracking. The worst kinds of changes are the <PARK NAME> is no longer a best park. Thanks a lot, but I made my ADRs 6 months ago and most of them can't be changed, so now I'm going to be at a park with a crowd level of 6 instead of the 2 it was predicted to be, because there's no way I'm getting a new Be Our Guest or CRT reservation 27 days before I'm going to be there. So you have no choice but to go to the park you originally planned to be at. It's just super annoying. This stuff just doesn't happen with EasyWDW unless there's some MAJOR event (like them adding a 24 hour day for the Monstrous Summer kickoff).
Here are the changes I got before our trip.
May 02: Resort-wide Crowd Level updated from 6 to 5.
May 02: Disney's Hollywood Studios Crowd Level updated from 4.1 to 2.9.
May 02: Animal Kingdom Crowd Level updated from 6.0 to 4.9.
May 03: Epcot Crowd Level updated from 2.6 to 5.3.
May 03: Disney's Hollywood Studios is now a best park.
May 03: Disney's Hollywood Studios Crowd Level updated from 5.2 to 3.2.
May 03: Epcot is no longer a best park.
May 04: Epcot is now a best park.
May 04: Epcot Crowd Level updated from 5.7 to 2.9.
May 04: Animal Kingdom is no longer a best park.
May 04: Animal Kingdom Crowd Level updated from 5.3 to 6.8.
May 04: Magic Kingdom Crowd Level updated from 6.4 to 7.9.
May 05: Resort-wide Crowd Level updated from 9 to 5.
May 05: Animal Kingdom Crowd Level updated from 9.7 to 5.2.
May 05: Magic Kingdom Crowd Level updated from 9.3 to 5.4.
May 05: Epcot Crowd Level updated from 4.6 to 2.3.
May 05: Disney's Hollywood Studios is now a park to avoid.
May 05: Disney's Hollywood Studios Crowd Level updated from 7.4 to 5.7.
May 05: Animal Kingdom is no longer a park to avoid.
May 06: Animal Kingdom Crowd Level updated from 4.8 to 3.3.
May 06: Animal Kingdom is now a best park.
May 07: Disney's Hollywood Studios Crowd Level updated from 2.6 to 4.4.
May 07: Animal Kingdom is no longer a park to avoid.
May 07: Animal Kingdom Crowd Level updated from 4.6 to 3.2.
May 07: Disney's Hollywood Studios is no longer a best park.
May 07: Disney's Hollywood Studios is now a park to avoid.
May 08: Disney's Hollywood Studios Crowd Level updated from 2.9 to 4.3.
May 08: Animal Kingdom is now a best park.
May 08: Animal Kingdom is no longer a park to avoid.
May 08: Animal Kingdom Crowd Level updated from 4.8 to 3.1.
May 08: Disney's Hollywood Studios is now a park to avoid.
May 09: Disney's Hollywood Studios Crowd Level updated from 2.4 to 4.3.
May 09: Resort-wide Crowd Level updated from 4 to 5.
May 10: Disney's Hollywood Studios Crowd Level updated from 3.2 to 4.5.
May 10: Resort-wide Crowd Level updated from 5 to 6.
I got 4 of these kinds of emails with major changes, between February and the end of April.