I think change of channels in scenes is very usefull to speed up scene change. there can disable insert load in scenes and insert the effects want compare in diffrent busses. then the load of the channel need only change output to the bus with the effects to compare. so load a scene can be very fast. currently i use scenes not for effects, because inserts load is too slow. I have a fast 6 core cpu i5 8600. so i can not buy faster. I switch the output channels and use diffrent bus for inserts when i wish compare. and when the output channel switch can store in scenes it help alot. in the example rev2 and rev1 are the bus that contain the diffrent reverbs to compare. I use often busses, because i can us e the effects for other tracks. often i need no special effect for only 1 track insert. for example when have multi outputs for drums. use sends have the problem that the effect presets need change that they output no direct signal