They don't need to do a full rebuild. They have grown their #1c, a likely #3c, a toolsy middle six winger, a couple of likely solid role players, a potential top pairing defender, a top 4 stay at home defenseman and a good bottom pairing puck mover.
What they need is to get younger, build up the asset list and gain cap space so they can weaponize both for the right missing pieces. The mistakes here have always been buying fancy carts that couldn't be pulled by their horses.
Cut out the Kovalchuk/Fiala/Dubois nonsense and they would really have had something here. Now they are limited in that ceiling, but it’s still a rosey outlook.