Krejci already stated that if he's not playing for the Bruins that he's returning to Czechia.
In regards to Dube, I'll pass. Kid can skate, but he's a liability. I watched him go -2 in a period vs. Dallas, both times he flubbed the puck leading to a breakaway and a 2 on 1. One of which was a short handed goal.
I'd rather have McAvoy and Krej QBing.
In regards to defense, I say we let the kids run with it this year and get some minutes. If we're really hurting come deadline, trade for a LD. Vaak, Lauzon, Zboril, and others are ready for try outs. Sign Chara for cheap and have him be 6th/7th. I can't think of a better defensive mentor both for his ex PP prowess and era of defensive dominance.
Number one issue absolutely has to be 2nd line wingers, and it can't be put off anymore. We're a joke around the league for being a one line team and it showed vs Tampa. Get Krejci some real freakin talent on his RW, none of this maybe he'll start playing good eventually if he takes less elbows to his dome, no more rotation of lumbering slow power forwards who wish they had half of the talent of peak Lucic.
Dish whatever you need to for a bonafide talent at wing, and it'll improve the depth chart in turn.