About revamping old RK stuff, please make sure that you don't change the difficulty on these, otherwise froobs will not be able to kill them anymore. Some of the RK encounters are still a great challenge for froob teams (mercs, agent lamb, aztur, HI...) and I think it would be a shame if it became too hard for them.
As far I as I am concerned, the biggest issue is the boringness of the grinding, and I know you are already concerned about it ; as you are working on daily missions (yay for these !) and similar stuff.