I’m not farming them, at all…? Because it’s pointless. This is exactly what I meant in my post, calculating playtime hours into outcome, it makes no sense. However, this vendor was introduced as a way to get these shards, by exchanging lower ones, all, down to greens. Now if you farm these faster by doing dungeons for blues or purple this is a further reason for changing rates, since the vendor did not contribute to the task he was introduced for, at all.
And btw I doubt you are faster with dungeons in the case of glimmerings btw… you need a lot of luck and dedicated groups to get 20 in less time than farming them from scratch aka greens… we did shards for almost 4h today, I got 2-3 glimmerings outta that, no more.
The thread where alot of people did those very same calculations is here, right when the npc was introduced, look at Landru’s and Scott’s comments:
And nope, they should not be that rare because the point of doing high-end content is to get a weapon, in the first place, not to get the tools to make that weapon useful. You need much more shards than ever available to roll a perfect combination anyways, likely 100s when you go for a certain combo.
Some few sure could get lucky and roll it earlier, fine, but others do 50, 100, 200 level 15 shards without getting the needed amount to properly roll the weapons they get.
Now the damage of a +6 is luckily least a bit higher, so a not perfect affix-combo is not a total waste. However, if you get a +5 or lower legendary weapon this one can even be worse than your old weapon, once it got the wrong affixes. Now since +6 are out no one even considers to reroll a +5 or lower legendary anymore, you can break down this stuff, since it’s not even worth it.
Rerolling any legendaries is still way, way too expensive and the vendor who was supposed to be a bandaid did not help a bit with that. You’re better off with your old weapon than with your legendary because it is - due to devs calculation - 20 times cheaper to roll one affix, unbending or what you need on it!
That’s why I do think effervescents are way too rare and it’s a flaw in the game that they are.