The first part is valid, but just because the Athletics is a requirement does not deter from your run speed. Also, I think Endurance is just as good, as it puts it out of arms length of a Spy unless they lower their con/defenses. Again Endurance can be used to justify the 'Recoil' scenario as you stated.

I'm not sure what you mean by the Weapon Lore part, surely this would lead to Spies being able to spec much less Weapon Lore to cap a viable PvP weapon?