Doubt this is how it should be, but when I have the option 'Link Dashboard to "old" My-Games Site' selected (and close and refresh) the behaviour changes as follows:
1) Multiplayer tab takes me to classic My-Games, previously taking me to the tidy dashboard. (This is ok)
2) Dashboard sub-tab within Multiplayer takes me to the Dashboard, but not the "tidy" version. Previously it took me to the tidy dashboard.
I am using Tampermonkey for Safari. If the second point is not how it should behave, I apologise if I wrongly said it was compatible with Safari before. I hadn't experimented with every option and assumed it was working. Besides this option it's been perfect for me.
Edited 1/11/2016 16:22:01