Stitch is an abomination, this is true. Taking your children into a room to have the lights turned out in pitch dark to have your children spit on by a monster was truly a feet of sadistic imagineering.
There aren't major problems but some of the trains are in dire need of work as some cart doors not functioning properly or at all. The structure could use a cleaning or painting which is also minor.
Content in my humble opinion could be a little more engaging or interesting. I like the City of Tomorrow presentation and the ride through Space Mountain but the other spots could be better , but that just my opinion.