You want people to have to do the old content to catch up, but you don´t necessarily want them to have to grind it for as long as you did when it was current.
The sad thing is there is a thread on the main forums getting blue responses that is just pathetic. Some guy crying because he can´t qualify for the new LFR solely by doing the old LFR... at the same time saying he refuses to use valor to upgrade his gear AND he refuses to do dailies, and he refuses to buy craftables.... Players are just getting very very pathetic lately. It is one of the things I have said a few times. Players want everything possible, but only want to do the one exact thing they want to do.
I really hope they keep the ilvl requirement for the new LFR where it is.. it requires people to put some effort into their characters.