A different view on fixing crafting metal
I think another solution could be that the price to unlock each rarity is reduced.
Of course rare things cost only 60 and that's fair but when we look at epic and legendary items it is just way too much.
Compared to rare items epic items don't deserve being 6,66 times the value of rare items as in many cases the difference ain't that much at all at least not that many times better therefore I suggest the value to be reduced to around 300 or 240 instead of 400.
Legendary items on the other hand are actually worth being expensive. But we need to admit that 1200 is too expensive even for a legandary item when we take into consideration the we get the metal to craft it, it is totally not fair and way too expensive.
If we even the price of the epic items and make it 240 to 300 then 800 would be just on point for legendary items.
You could increase the amount we get of metal for sure but that won't make for the low amount we got since release and that would'n be that much fair for those who kept playing the game for all that time and stayed active and loyal to the game only to be ignored with the fixes that would benefit only those who are yet to join (if it is to increase the amount of metal from apex packs) and those who were barely active and still have a lot of packs to earn and benefit from.
There for I see it most fair to reduce the cost of epic and legendary items and refund the difference for items unlocked before the reduction as I expect such data is always reserved for emergencies.
Hope you make the changes soon as the entire community is hungry for the slightest bit of fixing.