Its a valid point, because it is also ridiculously easy to farm MEF from base runs when you're farming for CIF anyway, and this is going to be compounded by the materials broker, who offers trading down. I have said before that he new materials broker combined with the ease of gathering MEF will turn CIF, previously the hardest data in the game to farm, possibly the hardest material, period, into the most trivial. You'll be exchange MEF at 9 CIF for 1 MEF. Since CIF is also gathered from the same activity as MEF, there is a clear balance issue here.
I also strongly support more varied and higher quantities of data and other material mission rewards. If materials are offered, they should always be minimum 4. I am never going to do a half hour mission for one of anything.