Legendary Drop Rates aren't just a single digit that is bumped.
Some players may think that there is just a single percentage that we are stoically refusing to nudge. That's not the case.
Consider this for example:
When someone says that "drop rates suck", what do they mean? YOU know what that may mean for you personally, but does your opinion overlap with everyone else? With a majority? With a minority? With X percentage? With Reddit?
Here's a list of things that "drop rates are bad" could mean, and bear in mind that every single answer would have a different improvement method:
- Does it mean players are not getting enough drops overall?
- Does it mean players are not getting enough drops in a certain location/expedition?
- Does it mean players are not getting enough drops at CT15?
- Does it mean players are not getting enough drops at CT14/13/12... etc.?
- Does it mean players are not getting enough drops in story mode or playing in campaign?
- Does it mean players are not getting enough drops in quests?
- Does it mean players are getting enough drops but not the items they want?
- Does it mean players are getting too much Armour? Too few Weapons? Or vice versa?
- Does it mean players are getting enough drops but not the item they want in the location they're farming?
- Does it mean players are getting the same item over and over again (Cannonball for example)?
- Does it mean players can't seem to find one particular item?
- And is that one single item universally difficult to find or for the reporting player in question?
- Does it mean they're encountering droughts every now and again or that the drop rate is always bad?
I've seen arguments for pretty much every single one of these individual questions and many players have very specific opinions on each of them.
In this very thread you have /u/Vohsbergh saying that CT15 drop rates aren't good enough.
You also have /u/Duncanavfc saying that drop rates are fine, but what drops is not.
In other threads you have players saying that Legendary drops like candy for them on CT15.
In still other threads, the Cannonball set has become a meme because of it's high drop rate compared to other items.
Some (perhaps many?) of these complaints can be alleviated with a better understanding of the system.
Other complaints may well require a drop rate buff, but before we get to that, we'd want to understand which systems are okay (with a proper understanding thereof) versus which ones in general need reworking.
We're also aware of requests/suggestions for Tiago to rotate his shop and how that could help alleviate some of these problems. However this, much like other great suggestions for QOL improvements (such as Transmog), would require a lot of design (and reviewing of the overall drop design) and coding to implement. I'm not saying it's impossible, but it's not something that can be done at the drop of the hat at this point in time.
Just to wrap it up:
Many players can be unhappy with "the drop rate" as this monolithic idea.
But why they're unhappy can be down to a multitude of issues. And a multitude of issues require bespoke tweaks.