the major's recon is awful for artillery spotting. The thunderbolt zoom over head in a single pass and reveal a location for maybe about 5 seconds.
the flare stay up in the air and there's nothing you can do to bring it down.
True. But on the flip side the major recon gives to a glimpse of most to all the map (gets pretty solid with vet) whereas the flare needs to be in range and is only in the area you set it.
Different types of recon.
HOWEVER if all mortars are losing their offensive distinctions then the soviet mortar will undoubtedly be king with a 6 man crew and vet 0 flares so something will have to give.