It will be nice if you give players a chance to reset skills unlimited times or for a few times without gems for a few days, especially after the game changes, and players get more experience playing the game, and with levels, as for example after XXL content the deposit found for saltpeter, titanium, and granite.
Also with more levels players maybe was think about gold chain and now they need to care about those new things, or maybe players are now focused on PvP or want PvP so they need to change skills for iron.
Many examples I can give, even its a chance for players to complete achievements.
Even the scouts might be messed up with timing (especially after the last update) the artifact search now is somehow different between explorers.