Regarding some of the talk about signing Marner, regardless of whether it's true Marner "really wants to play for Carolina" according to a Twitter profile that's iffy at best, I'd personally rather we not hand out a huge contract to another winger after Rantanen.
After Rantanen, if we were to sign a player to another 10+ million dollar contract, it should either be (1) a right-handed defenseman to replace Burns, or (2) an elite 2nd centerman.
I'd worry about not enough financial focus on other positions if we have Rantanen and Marner, both wingers, extended for, at the very least, 12 million dollars. However, if Marner actually does want to really play for us, I don't rule out Carolina just signing him anyway given how elite he is. Hopefully in that scenario, we are able to still get a new good defenseman after Burns retires that we can afford, and just roll with KK as our 2C who has amazing wingers to work with.
Excluding Marner from the picture, if we want to throw money around this off season at free agents, Ekblad is still appealing. Yeah, he has some injury history. However, he's a good point producer, has an edge (i.e. a good amount of hits) to his game which we could use more off in the playoffs, and he's a right handed defenseman. Then try to sign Benett as our 2C who isn't Marner or Rantanen super-star tier, but is still very good for a 2C; especially come playoff time. Although I'm kind of skeptical either sign with us because Florida remains very good.
I also wouldn't mind if we extended Andersen to 1-2 years if he keeps doing well, but I agree that if we do this, we need to find a good 3rd string goalie for the very real likelihood that Andersen gets injured again. In addition to being elite when he is healthy, and there just not being many good alternatives for a starting goalie now or during the summer, it would also benefit us to focus our attention elsewhere instead of also having a new starting goalie on our to-do list. I think a #1 RHD is plenty enough to deal with, and then throw in possibly getting a new 2C if they want to get someone better for the role than however KK does this year, and both gives our front office plenty to work on improving.