My two cents which aren't even worth that, are that lalondes system and the way Yzerman wanted to build the team were going in different directions.
I don't believe Lalonde was a bad coach, I think he had some things to learn still with only a couple seasons as head coach. However the style of play he wanted to implement was never going to work with guys like kane leading the team.
Even last year the team had way more energy and I felt Lalonde deserved another year to reign in his coaching mishaps and lack of timeouts. It's a shame that he never put it all together here and I really hope he gets another chance even as an assistant. He seemed like a really likeable guy, he just didn't fit Yzerman vision this year (evidenced by yzermans presser where he said he wasn't going to micro manage Lalonde but he had a different vision in terms of playing style, which I'm sure was closer to Tampa's style)
A lot of harsh words being said about newsey, some deserved and some not. As far as I understand most of the players liked him, just not his coaching style, it happens.
Best of luck newsey, you did tremendous work helping the team take the next step, and I wish you all of the luck in the future.