You are certainly welcome to your opinion. But, some specific evidence such as screenshots of specific Button Rules that fail, logs of them failing, etc, would make it easier to find out what is actually going on.
Meanwhile, there is a new version of both Button Controller and Button Rule in beta testing, for release 2.3.3. Both have new UIs that are not slow at all. These releases work with existing instances as they are, with no steps to update the apps once 2.3.3 is installed.
