The only way I could see this as being a viable option is if you could have a max of 5 players on loan to you at any one time, Otherwise the system would get abused I also don't entirely agree with this because for example I run a guild where i have a level 86 account some of my members are only level 71 if I gave them my players they'd have a really good team without having to earn it or tactically improve . I think it would also be an unfair advantage if you was in a top team like legions and you setup a junior team and you gave your second team a mega player from your main side just because of the guild you're in nobody would compete with your junior side.