Why are we still in the 2003 method of server/client input processing? A 1 - 3 second delay for input is silly. When every other MMO on the market doesn't have the input lag that XIV has, something's fishy. XI came out far too long ago to be considered a competitor for today's MMO society, so stop stealing from the engine. SE bragged about the Crystal Tools engine and how it was made just for this game, however it's blatantly obvious that it's XI's engine with fancy new rendering code and a new asset file format in the most basic of terms.
Don't get me wrong, I understand there's always going to be latency issues, but I normally operate between 10 - 15 MS s/r and sometimes it's the better part of 2.5 seconds before dialog input registers. You have 100 slots, selling items in 50 slots is completely obnoxious when you have to wait forever for it to actually sell.
This isn't XI, and from the press releases, SE is headed for an MMO focus. We're a society of instant gratification and control. Input lag doesn't fit in very well and needs to be addressed.
On an unrelated, yet similar note -
There's a great deal of lag between computers, even at numbers in the low double digits of latency. Specifically referring to player positions. When on the same connection with a friend, both computers less than 20 MS, both PCs getting 60 FPS steady on the same hardware(Built our PCs exactly alike, except the case *see specs below), we both see ourselves very far ahead of the other player when running. In Gridania, you can even see the other player running up walls and silly stuff like that. The map is terribly inaccurate for another player's position if they're moving. Yet another thing carried over from XI.
*PC Specs
Phenom II x6 1090t CPU
12gb ram
SLI GeForce GTX 580's
128gb WD SSD Drive as main
2tb 10,000 RPM SATA storage drive
Windows 7 pro x64
WoW has probably roughly 20x the number of active subscribers per realm that XIV has and maintains input very close to that of a single player game. Marvelous things have happened since 2003, we don't need to program like half your subscribers will have dial up.