I am guilty of this kind of second-guessing, too. But the truth is that if you have a solid plan, you can have fun in any park on any day. And crowd calendars are not the most reliable things, either. You could end up doing a lot of work to change plans or spend a lot of money to add hoppers, and not really gain much.
If you really want to change parks, do it. As
@finedice said, there are always ways to get FP on the same day, and there are always ADRs to be had. Unless we're talking about giving up CRT, you can probably replace the ADR pretty easily. For some people the "feel" of the park (i.e. how many people are surrounding them in the walkways) is the most important thing, and if you're one of those people, then a change of plans might make the most sense.
But at this point, you probably have good FP scheduled that you booked at 60+ days. You could replace them, but might not be able to easily. If you booked headliners for good times, it's easier to use "refresh" and other strategies for mid-tier and low-tier rides in a crowded park than to start making new FP at two weeks out in a less crowded one.
While numbers on a crowd calendar can make it seem like there's going to be a big difference, there's often not much difference between one number and another. If you're going to a park that's predicted to be an 8, and are tempted to bail for a park that's predicted to be a 6, there's probably not going to be that much difference in how the park feels. Maybe you'll wait an extra 10 minutes in a line at the 8 park, but if you hopped to another park, you might spend an hour in transit.