they only lose 2 players from their monstrous front 7, and lose 1 player from their OL. they also have the #1 QB coming in to replace Watson....so yeah they'll be just fine.
Deshaun Watson, the RB Gallman, and two of their best WRs will be gone. It's no secret those players are going to the draft. They do have done nice talent coming back, but a lot of their offensive "WOW" will be gone.