Oh, did AD update their Spine export? We'll take a look ASAP! They had planned to support tags, then we can finally promote AD instead of nasty old Photoshop!
Ideally the AD export uses the slightly older JSON format. The newest versions of Spine have special cases so they will accept that older JSON, at least enough so that older export scripts don't have to be rewritten. The AD guys are awesome though and very responsive, so we'll drop them a line if there's a problem.