I think he's a real work in progress. He's not Francoeurish at the plate by any means, but I see him having the issue that his plate coverage is really good and he thinks he can hit pitches he really can't do much with. What has impressed me about Gattis is that he appears to understand hitting. One of the prettiest ABs I've seen all season (and I'll admit I haven't seen all that many) is his long AB against Burke of the Mets where Gattis hit a go-ahead single on a full count by going the other way with a pitch. At least he doesn't swing at balls six inches off the ground like our favorite San Francisco Giant.
Like all young guys, I worry that they'll get a book on Gattis which will force him to make adjustments and whether or not he can do that successfully will determine his big league ceiling. He doesn't have a lot of flaws. He doesn't stride and starts his swing relatively late, but he's unbelievably strong and his bat speed looks good. I'm surprised more teams don't try to bust him inside, but if you miss in there with him, the ball is out of the park.