It's part of a conversion to the new res program that came out of the QS writing board a month and a half ago. The content for the QL3 is being changed substantially, including a change so that it will be done over 2 courses and will be fully equivalent to the Reg version. The concept is that most of the pers augmenting the op tours are at the Spr/ Cpl level, and are needed to have the same basic building block skills.
In fact, if you look at the CTP for the recently demised QL5, it was mostly just PO's from the reg QL3 that didn't get covered on the res QL3. They're just now calling a spade a spade.
oh, and not much of an idea yet on whether there will be a QL5 under the new system. The QSWB recommended it, but I know that many Res CO's see a potential roadblock in terms of career advancement if it means 4 full summers to get fully qualified to MCpl- the preference would be for two summers of 8 weeks rather than 3 of 6 (and yes, I realize that that math doesn't work out- there would need to be some delta).