[Imp]

I like both however some thoughts from a game mechanics point of view regarding A.1)
"Spinning" units is a gamey thing to try & detect concealed units so.

1) This will not apply to infantry? Could benefit them by drawing fire & hence revealing a unit that would not have triggered otherwise.
2) Versus vehicles I see that as being fine, you put some fire in the general direction with other units, turn your vehicle to see if you can detect them & draw fire.

If you went for A) to wider differentiate between tanks & SPGuns you could make the cost 2MP for SPGs