The thing I am most excited for is that Liljegren is a prospect with high end talent going through an organization that has just done a superb job of developing high talented players into good 2-way players (Dermott, Kapanen, Johnsson, Rielly, Kadri, etc.).
Our AHL organization knows the mantra is to develop players so that they can play all situations and play 200ft hockey while Babcock has done a good job improving our players defensively; even if it means giving them limited offensive opportunities for the first while (see Rielly & Kadri). I have lots of faith our management can get him to play at least a decent defensive game and with his skillset he should have no problem hitting 40+pts in the NHL.
Edit: At this point you can't say he should be better than Rielly. After his draft year Rielly was seen as a better prospect, drafted higher, and progressed better than expected. He was a legit #1 defenseman (50+ pts while seeing top competition is easily a top 25 defenseman) last year and is still very young.