John Tortorella did a great job with the Rangers. The Rangers are, simply put, not a highly skilled team ala Boston, Vancouver, Chicago or even Toronto or Ottawa.
JT squeezed every last ounce of ability out of that roster and inspired the team to play better as a group than the sum of their parts. Under JT players like McDonaugh, Stepan, Moore, Brassard, Stralman, Callahan ... all saw huge improvements in their games and became the foundation of the team.
The Rangers overall talent is not anywhere close to the Canucks. The defense had Girardi and McDonaugh. Stall was hurt and the other guys, Moore, Del Zotto, Stralman, are not even close to the Bieksa, Hamhuis, Garrison, Edler group that Vancouver has.
Up front, Gaborik and Richards were great last year and terrible this year. No two ways about it. JT played guys like Brassard, Stepan and Boyle instead and took the Rangers as far as they could possibly go before the Bruins simply outclassed them. In Vancouver he will have a ton of fire power, and if he can keep Kesler healthy and find some penalty killers and grit on the 3-4th lines, the Canucks will be a much tougher team/playoff team.
JT's Ranger teams were meritocracies, he got more out of average players than most coaches and was not afraid to play young guys. His teams were tough, stood up for each other, and he took a stand against players who were simply not about the team - see Sean Avery.
He will do great in Vancouver and give the team a needed kick.