My feeling is to enable wobbly windows and here’s why. Back in the very early days of Compiz the wobbly windows demos are what got everyone excited. When Ubuntu started shipping with Compiz (on GNOME2) I am sure that wobbly windows were a big attraction for people to give Ubuntu a try, and some of them stayed.
Would wobbly windows still attract new comers to Ubuntu MATE? Does having wobbly windows in the default MATE profile stay true to recreating a classic Ubuntu desktop experience?