I wonder also if you changed machine/server or something, back in time when RPG had 6k players it was no problem with lags and now since a moment there is many people complaining about it
That and frequent server crashes... yesterday arround 22pm (gmt0) there were about 5 crashes from servur. If they are updating h5 stuff and x15 is getting laggy/crashing, probably means they are on the same machine.