Hard to say, since there is no way to know what your future tax brackets will be but...probably worth it.
As a rule of thumb it is good to defer taxes as long as possible (hey, why pay bills before you have to?), but math is associative, so as long as the tax bracket is the same, it doesn't matter when you pay the tax. It works out the same in the end. You can pay 20% on a small amount now and have less money in the future. Or you avoid taxes now, and pay 20% on a larger amount in the future. Math is the same.
But you never know what the actual taxes will turn out to be. You do know however the expenses are a guaranteed loss, so I'd go ahead and consolidate those funds in VTSAX. Bird in the hand and all that.