MSAs are farking stupid anyway. Should just make all medical expenses completely deductable, with no minimums or maximums, alongside the standard deduction, instead of this damnstupid "guess a number, get it deducted from your paycheck, and then either reclaim it or lose it at the end of the plan year".
Of course, much of the blame is mine, for literally waiting till the last day (and on the end of a long weekend, no less), to get my paperwork in.