You may be right about that. I thought the current drop rate and the possibility to buy shattering will lessened this phenomenon.
So yes i imagine that a possible solution is to not allow trading & exchanging shards, glyphs and runes.
I don’t know if it’s a good option or if they even consider that kind of management for the market.
What if skill points were tied to levels? It would solve the problem where gaining levels peters out very quickly and you’d get to keep your skill points as well.
An example could be alternating between passives and skill points every level.
The current system discourages experimentation. Other ideas: when you replace a specialised skill with another one, have the skill points gained on the new one taken off from the former one. Another idea: old skill retains all or nearly all ranks until you have invested at least, say, five points in the new one.