First of all: the concept of discounted items when also tradeable on the tp. The homestead materials are a good example because they are not tradeable and only the shards created can be traded. But the shards from the janthir wilds maps aren't a good one. Why? Because after the weekly limit they become completely unprofitable to buy when they are on the tp at a third of the price. It becomes just a noob trap to buy more than 7 in one week. A solution to this would be if the amalgamated gem price stayed the same but the accountbound materials increased much more. To give them more value this way since no one buys them from one vendor more than 7 per week (cuz if they do then they do it at increased cost with no benefit).
Second of all: ascended weapons and armor from raids. Let us exchange it directly to magnetite shards the same way we exchange minis. I mean the problem was partly solved by adding the 20 use ascended salvage kit to the weekly raid vendor, but it is still costly and many of us who don't need the ascended have no use for the 100th vision crystal.
Third suggestion: Now I dunno if you would like this suggestion or downvote me to oblivion, but: allow us to exchange heart tokens from JW and VoE to core tyria heart tokens and "instantly complete a random uncompleted heart" or something similar to help with map completion of the core map.