Of course he's only getting 13 minutes of ice time, he's still young and developing. Putting him on the top line in Tampa would be like throwing him to the wolves. In time I think he'll be a solid 2nd pairing defenseman.
Meh, it''s his 4th year of professional hockey, 3rd in the NHL. Same draft year as McDonagh, Shattenkirk, Subban, Smith, Gunnarson, Cole, Blum, Weber (Montreal), etc.
Yannick Weber is the only one playing a similar role to Aulie at the moment, and I wouldn't be rushing to trade Ashton for him.
Now that's not to say I think Ashton has a particularly high ceiling. I think he should just become a solid two-way 3rd liner with size who can add some secondary scoring, which is what it is. I just don't see the point in getting all concerned about what Aulie is doing, because he hasn't shown the ability to be and isn't projected to be anything special at the NHL level.