Megaserver = more bad than good
Quite a few more zones than the 1-15 have already been changed in Megaservers unless map-chat is messing with me. Bloodtide Coast didn’t mention I was in an overflow and people talked about being from different servers. Fireheart Rise aswell.
As for Dailies, Dungeons, chests, etc., there is this: https://forum-en.gw2archive.eu/forum/support/bugs/Merged-topics-Achievement-bug-no-chests-dailies-stuck/first#post3923229
As for the rest, it would be best to give feedback in the appropriate designated threads, where those Devs most responsible will be able to see your comments. =)
It’s not so much a bug as a design flaw.