When I see Ratmansky's ballets I feel that ballet is alive as an art profoundly in touch with its past, while still offering new creative visions to the future. Would it be great if we had a list of more "slam dunk" Ratmansky ballets done specifically for ABT--well, sure. And he seems to maintain a superhuman schedule of staging and choreography around the world that occasionally makes one wonder if he does not 'spread himself too thin.' Let's just say he appears very driven, and I for one am delighted he is working with ABT on a regular basis. It gives them a calling card as a serious artistic enterprise that they would otherwise, in my opinion, be decidedly lacking.
The Tempest? Let's say I'm wrong and it's simply an unsalvageable disaster. At any rate it's not "meh" (a word that is one of the internet's best contributions to critical vocabulary)--it's trying to do something serious.
You've put your finger on something substantial here - Ratmansky does seem to both honor the past and look towards the future, and does both using ballet as his material, rather than hybridizing the art form with other dance traditions. From what I've seen and heard, he's learning from his experiences, challenging himself and his dancers by taking them and the work seriously. You take chances, you make a lot of stuff -- not all of it will be unalloyed successes. But in the long run, it's good for the artist and it's good for the art form.