Truthfully, I can't believe they weren't here sooner. As far as I can tell, Disney's usual SOP (notice I said "usual" not "unvaried", so there's no need to point out the few exceptions) is to introduce new characters (at least for M&Gs) at DHS, and once they prove they have legs, they get moved to MK. But TDO decided it would be cute to put them in Norway, and chaos ensued. They then moved them to MK, thereby giving birth to the Frozen 5K at rope drop. So by deviating from their standard procedure, they've managed to create huge crowds at their two busiest parks, while DHS sits in the back of the classroom, alone and ignored. Apparently someone somewhere must have decided that may not be the best strategy...