This seems to be an economic thing actually, as a place over here called Center Parcs who used to do all their own resturants and things have recently started converting their resturants and coffee houses into Bella Italias and Starbucks. Maybe its a case of the bigger company giving the smaller companies a helping hand? It isnt as if Downtown Disney is all Disney only stuff.
This is a bit odd. Disneys always worked with other companies. Even back in the Disneylands early days you had a Kodak camera store, a Carnation Ice Cream palor ect. Heck Disney made rides for other companies. It's only been the past few decades that Disneys really tried to do it itself and thats because the economy was stronger at the time I suspect.
Though you could argue both sides of the coin are "un-disney". PI isnt really Disney, as Disney is about family fun and PI is rather kid unfriendly bar possibly Comedy Warehouse and Adventurers Club. But it happened, and PI because a pretty decent Disney concept. It's just a shame after one police call too many Disney decided to make it so only over 21s could enjoy PI, effectively banning PI's original core audience.
So offering that space to other businesses might make better sense in that respect. Places that have more adult entertainment but can cater to familes too. Plus considering the money issue, it helps the business and Disney. So both do their part to support each other and the economy. Which sounds more "Disney" to me personally.