Even for a 4C, Glendening is pretty awful. Perhaps he can do better if he gets easier minutes in DAL, but he has been, essentially, a worse Antoine Vermette for most of his career.
$1.5 is a steal for him; all the DAL fans complaining now will be choking on their words in a few months. LGD is a stud 4th liner and PK specialist. He was forced to play much higher in the lineup in Det because of such a lack of C depth. In Dal he can stick to what he’s good at, and you’ll love him for it!