Did some arena last night, and I was also talking to a friend of mine who played a mage to ask his opinion on something I noticed and he pretty much agreed.
Played 7 arena matches against teams that had a mage. I was playing MW because i like the spec, and trying to get better at it. (It sucks but it's still fun) Anyway....
We won all the matches except one, but that doesn't matter really because we were doing low mmr games. The biggest thing I did notice was I was able to prevent every single deep/bomb attempt.
The game we did lose they had to train me, and set up deep/bomb on me (the healer/dispeller) to get it to land. Putting it on any dps pretty much wouldn't work even if they started with a blanket silence.
My friend was telling me he was having the exact same problem playing at 2300 MMR. The only way to land bomb was to train the healer every match. Landing any type of kill attempt on the dps is impossible, and now healers save trinket to prevent the burst bomb attempt.
He felt it wasn't fair that teams now can plan their entire strategy around preventing bomb, knowing the mage can't do any significant pressure without it.