Unless you're totally bleeding edge progression, it's not mandatory. Nice and helpful, maybe, but not mandatory.
Anyway, people whined and complained constantly about having to farm heroics each week for VP last patch. Now you have an alternative, you can boost your way to VP by doing 2 x LFRs.
---------- Post added 2012-01-10 at 10:43 AM ----------
You do understand that part of the reason for implementing LFR is so that people can see and enjoy all the content, right?