If you try use one of your external Fx as an insert it wouln’t show if already in use on another track. This can be irritating in larger projects. A warning window indicating the track on which the external FX is in use would be helpful.
Also it would bwe nice if you could insert all stereo External FX either as Stereo or dual mono so you could choose if you want to use these as stereo or on two seperate mono tracks without having to change the basic setup in the audio connections.