I'm curious what you thought that line should have been? Vancouver was at home and has 50% more wins than Colorado and had 6 wins in their previous 10 games while Colorado has 1.
Don't forget playing at home in the NHL is a huge advantage for any team. Home teams are nearly 60% this year straight up with only 4 teams showing a losing record at home. That number includes the OT/SO losses. Said another way, only 4 teams would have cashed less tickets than they lost at home this year so far.
Colorado, Arizona, Buffalo and Detroit.
You would likely be printing cash (though I don't know all the actual lines) by betting on just home teams this year of -200 and less. Home favorites are cashing at 63% this year which is a bit misleading since sometimes the juice is so high when the top teams host the bottom teams. Home dogs are cashing at 46%. Again, I don't know the actual lines on all those games but I have to feel just blindly betting home dogs this year in the NHL is profitable.
I guess I said a whole lot to say I think -145 was probably right on as far as that line goes, it may have even been generous.