I don't understand why this is an issue, an overwhelming majority of FPS and TPS games prevent you from doing this exact thing unless you have some sort of specific perk or ability that overrides this. CoD Ghosts has 'On the Go' for reloading while sprinting, and completely prevents you from reloading while aiming. Heck, Battlefield bolt-action rifles require you to stop aiming to chamber the next round, forget about reloading. I've played plenty of games where reloading prevents sprinting and sprinting prevents reloading. How is this an issue? It's not as is reloading is that long for most primaries, especially the high-end legendary's. Armor and weapons can both reduce this time. Maybe exotics can have this as a perk (especially sniper and scout rifles), even a few legendary's, but I just don't see a big issue.