Hi, I cant read the first messages, but I assume this here has nothing to do with the wall-plugin as the wall-plugin is disabled here for me in Mint Mate.
The problem is that the viewport/cube rotates immediately, correct? So it cant be the wall-plugin. There is a missing edge_flip_DELAY in the "rotate"-plugin, or someone has to make edge_flip from "rotate" plugin getting a delay by 'edge_delay' in general-settings. Please fix this soon, coders...its no fun at all to see the same problem since YEARS. Many thanks in advance