I’m currently sitting at max gold with nothing to use it on. Having the capability to buy low level keys with gold would feel very useful.
Right now there are good gold sinks. In particular, you can run an empowered dungeon, or refresh the shop with gems. Don’t get me wrong, I’d be happy to buy wood and iron keys with gold, but I don’t expect to see it, as they’re already for sale in the shop for gold and always available for honor.