The easiest way to answer that is that although they have, because they can, been innovating at a slower pace then they once did. They are no playing catch up... Uni is still playing catch up and even at the pace they are going now will take many more years to actually make it to the level of worlds most popular tourist attraction. We tend to think that because lately they have been building at a very fast pace, it cannot last forever. Money has to have a sufficient return to be deemed worthy of spending. Economics 101. And it still doesn't come close to offering the amounts of things to do at the resort that Disney has had for the past decade. Or even have the room to put the numbers of people that would make it a threat to Disney. Can you imagine what Uni would look like if on any given day they had as many people in Uni that Disney can and often does have in theirs?
They are still two theme parks, one water park (2 actually), thousands of hotel rooms and ability to move easily to bigger spaces away from catching up with WDW. (did I mention 3 golf courses) We are all upset because Disney hasn't been very active until recently. Honestly, they haven't needed to be and there is an argument that they still don't, but even if we think that what they are doing now is not enough, it will serve to push Uni back down a notch or so.
