Makes sense. On its own I don't think it's enough to be another Gear, since it's too close to just being a strength power up, but if it lets him do some new weird stuff then sure. If Oda's planning on having Luffy awaken his gomu powers, then that'll probably be Gear 5 instead though.
Maybe he can hit with his Conqhaki independently of his physical body. So like he goes to hit you with his Conqhaki on your right side and goes to bunch you on your left at the same time. You would have to use your own Conqhaki to block his haki and then block his physical attack with whatever is left over of your Conqhaki combined with your physical strength and Busoshoku. But when he uses his Conqhaki to hit you, he's no longer protecting his own body properly so he's also more vulnerable from attacks (especially Conqhaki attacks) himself. If Asura is from Zoro's Conqhaki, then Luffy could have a spirit type thing too, which could be used to show where his Conqhaki is attacking (the spirit throws punches and kicks, which are pure Conqhaki). I partly ripped this off from HxH's Enhancement Nen system (like how Gon can't protect himself fully while throwing a full power punch), because Conqhaki seems to be an aura, similar to Nen. We've seen Conqhaki mess with things far outside the user's body (eg Shanks and WB's clash messing up the sky and possibly Dragon using haki to mess with the weather, although that could be a Devil Fruit), which is why I think the haki could be able to come from different directions to hit the opponent.
