Don't feel frustrated, Bonethrasher is the hardest boss in KP. My guild has cleared it on all difficulty modes, this is basically what we do:
Ranged players stay spread out and far from each other, like... one ranged dps will be on the north side of the map, another will be to the south, etc. Everyone who has to be within melee range stays as spread out as possible, so it's easy to see who got aggro. Name calling won't be efficient: sometimes it's all too fast, raid awareness is key. Everyone who doesn't have the aggro moves behind BT to avoid the swipe, the person who has the aggro just has to take it in with added care from the healers.
Kill the adds as soon as they spawn. The last adds that show up are those two big cats, CC them and keep them CC'ed until BT is dead, then finish them off.
For the puzzle boss: have at most two people working on it. This one is about coordination, what we did in my guild (in the beginning) was having an off-tank staying always with one of the consoles (the far left one) and I would run between the other two, telling the off-tank to click when he had to. Nowadays everyone knows it so well that it's pretty much natural.