Not exactly.
This idea that he's here until he says otherwise is flat out false. His NMC becomes a modified NTC in 2 years, meaning he'll have to submit a list of HALF the teams in the league he'd accept a trade to. So even if he doesn't want to leave won't have a choice.
Fwiw, I'm a big Krejci fan, and I still think he can be a terrific player with the right wingers but I also see a player who's not comfortable with the new style they're trying to play. Sweeney is trying to turn this into in a fast team with lots of movement, stretch passing and Marchand/Pastrnak types slashing and dashing. It's working for some players but that's not DK46. He's a slow it down type. He's a guy who wants to cycle. So unless he changes or they build a line around his style and let that line play differently than everyone else I think he will become someone they look to phase out.
I don't think that phasing out is going to happen this year, but I wouldn't be surprised if Krejci gets moved right before that limited NTC is set to kick in, when Krejci still has the full NMC in effect. That way, he can have total control over where he goes.
I think there are two other factors in play here as well...
1) They want to make the playoffs this year and he's an important part of that hope.
2) I think they want guys ready to step into the spot he vacates. Personally, I'm not sure we have anyone in the system with that kind of upside, but Kirk thinks they're banking on JFK being that guy. If that's the case, you figure JFK gets 3rd line duty next year and the following season is when they start to think about moving Krejci, with JFK knocking on the door and Krejci about to lose control over where he plays.