Bussing question

Hey all.
 
I am looking for opinions on my bussing setup.
I have a busses setup for my reverb called small room, medium room, and large room.
 
I have busses set up called lead vocal, backing vocal
 I am routing my background vocal tracks to the background vocal buss, I add my reverb send buss to the background vocal buss this way rather than placing a reverb send on each vocal track, I apply my reverb at my background vocal buss.
I then send all of my busses to a bus called submaster which the fader is always all the way down, then to a mix left and a mix right, and then to a master buss. 
My question is concerning placing the reverb send on the individual busses rather than on the individual tracks.
I do the same with my guitar busses, and so on,..
Does anyone see issues with this setup?
Thanks

Hey bit. The submaster was part of a template that Jonas put together sometime ago.