Well I'd assume there will be some great weapons of different types you can't buy in shops, and therefore can't give to everybody, so there's that.
Is the License board set up so that you can easily give everyone whatever the 'best' weapon type at the time is? I just started so I don't know, but it seems to me that unlocking Spear 1 would lead to Spear 2, etc. and that would take you away from things like Gun 2, Axe 2. Of course if you just hardcore level you can unlock them for everybody, but that's tedious.
actually, its only partially like that. Spears lead to spears, but if you only go the spear path, eventually it cuts off, and sips a block, so youll have to get the new weapon then go on.