I've wanted that functionality for a long time now. Like you can change stuff for all channels by holding CTRL+clicking on what you want in the channel strip I would like to hold CTRL and add a VST to ALL tracks.
It's a bit of work but I actually have track templates for all VSTi i use on a regular basis. I've named them Omnisphere, Moog Modular etc... And to the track templates I've added Waves NLS and some other stuff since I use that on more or less everything. I never add synths anymore by going to "insert softsynth". I use track templates. I also have for adding regular audiotracks, one template for stereo and one for mono.
/M