There are loading zones in both seamless and delimited worlds. The only odd thing SE has done is go back to the old dotted delimiter and zone title system. It does not affect the speed of loading ... or even game design really. Zoning allows modular programming which is necessary in all large games. Your system memory can only hold just so much. Downloaded data has to be merged with server data to produce an active world. Do I like it? I could do without the lines and names. I think it detracts from the feeling of immersion. When you are not in a battle, all the info on-screen detracts from the feeling of immersion. That is why many players play with names turned off. So breaking immersion with a dotted line and a title seems very retro.