When it comes to field-to-robot damage, I would agree that this year is probably one of the most rough I've seen. In terms of robot-to-robot damage though, I would actually call this years game pretty tame. With the field as restricted as it was, and the rules on defense what they were, it made it difficult for many situations that would normally result in robot-to-robot damage to occur.
The issue you brought up with bumpers is more about weight distribution and the "bumper zone" being too large. This was also an issue in 2010 when teams had to mount their bumpers high, and would constantly end up driving up over each other, or pushing each other vertically.
As far as manipulators go, basically any time there is a game where you have to extend some part of your robot outside your frame perimeter (ie, most games) you have the risk of damage to it. I for one, think they should bring back the line that used to be in every game animation that was something to the effect of "robots should be built robustly to withstand impacts from other robots and game pieces". If you're worried you might break it, make it stronger or bring a spare.
