It'll work fine for a flatbar MTB application if you want.
Brakes could be a problem- from the location of the pivot it does not appear that they will work with linear pull brakes (v-brake) - would have to be some type of cantilever brake or maybe the road version of the avid mechanical disc brake.
Campagnolo also has re-introduced cantilevers as has Shimano and Avid still make some.
No problem there.
They work just was well as linear pull brakes; Cantis disappeared do to marketing and Shimano...just like the square taper crankset.