The new co-pay on international eupgrades for Altitude tiers below SE dramatically de-values E50 in my opinion. Used to be that E50 would allow you to eup on all Flex fares (as opposed to M fares only for E35 on intl flights), but the new co-pay likely means that many E50 fliers will no longer be upgrading those flights.

On the other hand, those E50ers will be now be flush with credits for domestic eups, which may in turn squeeze out E35ers. And yeah - *G is really nice for all the little things (priority security lines!).