As this discussion pertains to Mists where the values of haste and mastery may each outweigh the value of crit, then, no, crit is not needed. I see this change to Inq as Blizzard saying, point blank, "Retribution Paladins do not need to gear for crit because their new found need for haste and mastery is that much greater." Now, I'm not saying this is definitive, but it is possible; if math eventually proves wrong my theories, so be it.
EDIT: I'd like to reiterate that my views and opinions are strictly for PvE; if you're saying that crit is till going to be important for PvP, I will agree with you one hundred percent.