I like bringing in Boyle, around 50% for faceoffs (trends a bit over) and has the size down the middle. His point production is really only a tad behind Hanzals (22 points in 54 vs 26 in 51) so all in all if he could be had for such a price I think it's a great idea. Personally that seems fair to me for value, especially when dealing with a potential playoff rival.
Burrows/Edler aren't bad additions but if we are adding an offensive player it really is only a half measure to add someone who isn't boosting top 6 (our problem is scoring and although Boyle/Burrows definitely improve the bottom six's weaknesses and possible character issues, still need scoring help).
Edler I'm unsure of, firstly is he the answer to who can compliment weber and more importantly is he as good as he needs to be (as he used to be as a two way presence). I'm worried that Edler will just end up being a bust that can't really improve our defensive side and hurts us with a higher contract with a NTC.