Hm, this one’s a bit more complicated than thought. In other editors the panning is also with Middle mouse button. And here the conflicts are not so easy to resolve. Lots of functionality is rmb. I think of trying to make pan with MMB in the 3d view too, so that it is consistent again. What do you think?
On the other hand, i am this used now to rmb to pan the 3D view … 