Drop rate.
…man, how about a round of applause for Google Translate? That actually was not gibberish. Must’ve fixed a few of their bugs.
Not really sure what to tell you, though, regarding your question; it’s entirely possible, but it’d take looking into the code to find out for sure (unless the devs decide to answer), and I’d honestly never noticed. I’d be interested in knowing, though.
It seems my “luck” is a daily thing, and not based upon the amount of time I spend in an area. Some days I make out like a bandit and feel they must have uped the drop rate and other days I may as well go outside (and usually do). It almost seems their RNG is based upon some strange name/day of week/weather combo, but if I can crack the code I will know when to bother playing and when to go clean out the garage.
I’ve certainly noticed a lack of rare drops during Cursed Shore Dynamic Events farming since the patch.
Maybe this was compensated with the apparent improved drops from Veterans/Champions/Chests but I haven’t really noticed it.
It could all just be bad luck though….time will tell.
There are a few other players who also noted a possible change. Check out this thread: https://forum-en.gw2archive.eu/forum/game/gw2/Will-not-touch-game-for-a-long-time