Listed at 6-4, size is clearly not an impediment to him being an effective starter, and I think the slow and smooth delivery is pretty repeatable (walks have clearly not been a problem for him). He uses a pause when his leg comes to create some timing issues for hitters, not coming forward until it comes back down.
As far as general observations from his outing itself, his 82 MPH slider seemed sort of flat looking. He often bounced the slow curve, and seemed to slow down his arm to throw it. I thought he became a lot more hittable late in the game, as the stuff wasn't overpowering even for a AAA game. Some of the slower fastballs had a little bit of cut or something to them, even though it doesn't appear that he throws a cutter.
His release point this year is closest to Bobby Parnell and Darrell Rasner (with the high leg kick and the slow curve, it has been hard for me to shake the idea that he reminds me of certain NPB pitchers, with Rasner, currently a reliever for the Rakuten Golden Eagles, showing up, that feeling isn't going away) as starters. Here is a visual look at what his release point looks like and the average location of all the pitches he has thrown in the Majors this season:
Lindblom is a pretty heavy groundball guy, getting more groundouts than strikeouts this season, and it appears that hitters are pretty balanced as to where they hit the ball against him (courtesy of MLBfarm)