An idea I got while writing this post is that if the reason behind the introduction of LFR is to let casuals inside raids they otherwise would never be able to see, creating a tourist mode, they could simply convert all previous expansion raids into 10 man dungeons. By doing so not only would that keep the content alive forever, creating a new game mode, the current expansion raids don't become pointless once you've seen them in LFR and keep that sense of wonder, challenge, reward and unknown unless you try them yourself thereby giving meaning to them.
10 man raids-turned-dungeons can be done at level 30 (in SL), more challenging than leveling dungeons, but for much better rewards. What do you all think?
Edit:
I wasn't saying let's remove LFR. What I really would like to see is a scaled LFR of all raids in all expansions, including vanilla raids all accessible in tourist mode either as leveling raids or at max level. There are so many fun encounters from previous expansions that it's a shame new players won't get a chance to explore in full mechanics. If we can play all dungeons, every single one of them, old and new at all times and in full mechanics, why not have the same for all raids?