Over the last few months there have been a few behind-the-scenes complaints sent to the White House from various business representatives in Washington about this subject. Their primary complaint is not so much that reservists are being called up for active duty, but that the U.S. armed forces is operating under severely dysfunctional conditions in which many areas that used to be part of the military's primary mission are now being staffed almost exclusively by reservists.
Nuclear, biological, and chemical (NBC) units, for example, are comprised almost entirely of reserve personnel, with no full-time units.
One local U.S. Marine unit in my area has just been re-activated for duty even though they had just returned from a 12-month call-up that ended in December.
This is not dysfuncitonal but a deliberate result of sound planning to make more effective use of the reserve. One of the points is that there are a lot of skills which required a lot of training and experience, but are not so physically demanding. For these jobs, the 35 year old reservist who has done this for 15 years is much more valuable than the 22 year old who has done it for 7 weeks.