Couts will be 25 this year, this team will be competitive by 2019-20 and definitely 2020-21. So it makes zero sense to trade him.
Giroux is probably untradeable, and wouldn't bring back enough to make up for losing his leadership.
Voracek might be tradeable, and it would get the team out from under his contract, and he might prefer to play for a playoff team in his prime years.
Ghost is more of an opportunistic move, if you could get a top four RHD and balance the defense.
No, if we are blowing this team up a 25 year old Coots is very much on the chopping block. Presumably, we would be trading for future draft picks and/or high end prospects if we are dealing all these guys. Why keep Coots? You're essentially gambling when you trade away an NHL player for futures.
In a scenario where we are legit blowing up the team and dealing G, Voracek,
and Simmer, there is no guarantee that any of the return turns into anything at all, certainly no guarantee that they are the building blocks for a Cup (the assets going out are assets we got in trades to blow it up once before, remember?). Hanging on to Coots doesn't make a lot of sense in this situation given the fact that none of the assets we'd get in return would presumably be guaranteed to make any impact ever in the NHL, let alone in the next couple years when he'd be at his highest value to the team. If you're blowing it up, blow it up. Pretty much anyone on the roster now should be tradebait except Provolone, Sanheim, and the Neck. Anyone should be offered up to the highest bidders (not suggesting they are traded for peanuts, but they should try to get as much as possible for anyone). Let Provolone completely take over the D, with Sanheim, Hagg, Morin, Myers, Friedman, etc. filling out the rest. Roll with Lindblom and Rubstov, maybe Frost next year depending on how he is progressing. If they can get Villardi see how he fits in the NHL next year. Grab (at least) three additional draft picks in this year's draft by dealing Voracek, G, and Simmer, leaving the team with five in a strong draft. Maybe pick up an additional first next year along the way somehow too. That is how you rebuild. Go big or go home. Sixers style. Not at all my first choice but if we are talking about blowing it up and trading off our best players, you gotta go big or go home.
Otherwise, trade Simmer and get as much as you can and work with what we have (which, frankly would be my preferred option).