With the new system, your bag roll is worth not much.
Unless you were in the zone from when it opened and have the chance to contribute in every aspect of flipping it you won't get a decent shot at getting gold bag. With the new system people which can invest less time in the game do not have much chance to win 1-2 bags a week as it was before.
Regarding the meds, 2 for losing a fort, potentially 1/none per stage for losing a city (yes, giving you a worse case scenario). From oRvR I would not even consider the medals, by the time you have half invader you are drowning into vanquisher unless you did remember to switch off the auto-need roll.
The chance for these extra bags could motivate many players (and yes, they would give even more rewards to ppl spending most of their day online, but that's how it goes anyway), which at least would know they will get something out of their participation to RvR.
OP's idea is not necessarily the best option, but it is not as unnecessary as you might think