I didn't say they should build a 5th park, but they certainly need to be building out the ones they already have. Disney will still have an entire park more than Universal, but what do you think would happen if we actually counted the number of attractions at each resort? I suspect that would paint a less rosy picture. Just because Disney is "ahead" in the amount of stuff they have, however you choose to gauge that, it doesn't mean they can be complacent (especially with the recent, relatively widespread backlash against them as a company, but I won't get into all that.) So yes, they technically need to do continue doing things.