Brind'Amour is literally the fastest coach to 300 wins and has the most wins in his first 500 games as a head coach. Canes have made the playoffs every year since he's been coach and have won a round every year.
This is also with a team that in that time frame hasn't had elite offensive talent and elite goaltending. Defense has always been very strong even if it maybe lacked true game breaking talent like a Fox, Josi, Karlsson, Makar, Hughes, etc... but those guys are also like exceptionally rare.
Canes haven't won the cup in that time and that's a fair point but also not every team has McDrai, MacKinnon, Kucherov, type players that you can just unleash some sort of full court offensive press mindset.
You will not find more of a puck hound in the league than Necas. I've said it many times before but his whole purpose in life is to get that puck, skate with it and make offense happen