Option one would probably, while indeed making some guns more powerful, also raise the power of the already meta weapons, resulting in a rather similar situation to why we're seeing now. Option two would, well, be the same crap we're dealing with right now, where we all complain on the forums, Bungie changes something, and we whine about that. Option three would take a good deal longer, as it would require Bungie to really examine all the weapons in their current PVP state and buff or nerf them based on whether they are more or less powerful then their counterparts.