Completely ignoring the Malek argument for a second, I think there is still some point to be made about GET1 decrease in Geo TB. The Geo TB was meant to be a progressionary step above the Hoth TB, but in this case it does have a rather severe downside in producing less GET1.
Getting back to the Malek argument now. Just because people saved their GET1 for Malek, it still doesn't make GET1 any more of a lesser resource now that they have a 7* Malek compared to those who don't. Like people have said, GET1 is still an extremely valuable resource for gear. I don't think it has anything to do with getting Malek for cheaper; everyone should pay the same price. If GET1 amount is increased, everyone who has 7* Malek will be able to purchase much more gear than those who are still trying to finish theirs. It's a win/win here. Even though the OP is arguing to make the Malek shards cheaper; I think a better argument would be for Geo TB to match the last step of their guilds progression which is mastery of the Hoth TB while adding a little something extra which would be the GET2. I honestly think this is a very reasonable assertion rather than reducing the currency price for the character shards.