This sounds promising but currently purchases from the App Store are individual purchases. They're not really configured for enterprise app re-deployment and (last time I checked) don't have any easy way to buy multiple licenses and let users download individually with their own AppleID. And while you state this trend is counter to industry trends, that pendulum will eventually swing back towards in-sourcing IT especially if your firm is security focused.
Honestly, I think that if an organization is looking at this option for BYO Apple products, they should also consider JAMF's Casper Suite. It's a full management solution akin to SCCM for Windows but can provision, deploy, manage and push apps and policies to OSX & iOS devices better than any other product on the market.
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