Echoing TomC's comments, you should be bothered by the deaths on the MR this winter, especially if you are considering going up when you have to deal with ice and snow. For those who are experienced and comfortable with winter mountaineering, the MR isn't a huge risk in winter, although even for those who are experienced and comfortable with winter mountaineering, there are risks inherent in traveling steep faces covered in ice and snow, mistakes are easy to make and can be fatal.
Me, I knew even before the accidents this winter that I wouldn't touch the MR with a ten foot pole in the winter. I wouldn't touch the main trail until it was truly in "summer" condition (which sometimes doesn't happen until late in the summer). I am not a winter moutaineering guy.
But the MR, once "summer" conditions are truly present, is my cup of tea, either up or down (although, frankly, my knees like up better). Sure, one can get hurt on the MR in summer conditions if one is not careful, much more easily than one can get hurt on the main trail in summer conditions, but it should go without saying that it is easier to get hurt on class 3 terrain than it is on class 1 terrain.
If you are comfortable climbing class 3 rock that is dry, and not covered in snow and/or ice, however, then what happened this winter is not relevant to what you are doing. What happened this winter should still bother you, but for reasons having nothing to do with you planning to go up the MR in summer conditions.