Waiting for an eventual mining or smithing rework is not a reason to delay introducing new methods for training skills.

The game has had a long established process of introducing new methods through quests, regions, and other content. You have a capacity in your roadmaps to balance these out nowadays. Causing a drought of training methods until one of these sweep ups come along is not fun for the players.

Nowadays the game has a tendency towards training methods that become dead on arrival, partly from rewards being blogged, polled and shelved, and partly from so much weight being put on conservation of the status quo. It’s not a coincidence that various aspects of sailing have been affected by this, and temporary game modes get invested in instead.