I will throw more money at the Flexvolt line if they announce a dedicated shopvac. As far as I am concerned, Dewalt doesn't share with us, the consumers, the future direction of the Flexvolt range. Is it because they don't know yet?
Flexvolt has an alligator saw, which is a niche tool. If they want to fill the gaps in the market, I can think of more useful tools like cordless trimmer/router and shear.
Hell, I am already looking away from Flexvolt since Makita is releasing a cordless rear handle saw and trimmer router. Don't get me wrong, I love the Flexvolt tools like the circ saw and grinder. But Dewalt needs to do more and stay connected with the tradies.