Well, if sb. forces me to staff X players I will quit the game instaneneously!!!111!
For me a 5-man lineup has been a lot of fun so far, it makes my life much easier and takes a lot of pressure from me - so forcing me to get 7 junk players AND give them minutes would be pretty annoying and I don't see how this would improve the game.
The GS system, rotations, training and realism in general are debateable for sure, but this suggestion is no part of a possible solution I think.
Größter Knecht aller Zeiten aka His Excellency aka President for Life aka Field Marshal Al Hadji aka Lord of All the Beasts of the Earth and Fishes of the Seas aka aka Conqueror of the Buzzerbeater Empire in Europe in General and Austria in Particular