He should be taking over for Krug. If you play fantasy grab him early as his point totals are about to double. Heck, probably more than double? He played around 400 minutes with Bergeron or Krejci and about 600 without them at 5 on 5 last year. Expect those number to reverse. Breakout season incoming.
Want to quibble on saying Weegar is better defensively. Gryz is top notch as disrupting plays in center ice and prevention zone entries. Certainly not as good defending around his net as Weegar, but it’s not as clear cut as you threw out there.
I would normally agree, however, with Marchand and Pastrnak out for a good part of the beginning of the season… and then they have to get up to get into game shape… I think most Bruins players are going to be picking a hit in fantasy next year.