Ok, so let me get this straight, your telling me that SE should drop support of a platform that is still holding alot of there players in there primary market and do a Graphics and UI change that would of course cost money for production and manhours SE more then likely dosent want to spend on a game this old.
not to mention that but to accompany a full graphics change SE would probably have to re-model the engine thought it would probably add some new feel that we all need. Noone likes fighting inside mobs thats target area is smaller then there body.
Any PS2 capable PS3 supports this game, SONY released the tools for it, the same people you claim dropped support for the HD by releasing a cheeper system. At least at the time of this release SE was still supporting PS2 releases of the game. All that aside. Take the fact that most traditional MMOs never see a huge overhaul of graphics, but sometimes may see a few UI changes but nothing to big.
However I do propose this, SE make a poll accessable thought playonline veiwer asking simple questions referring to this already well over-discussed topic. To enusre they don't lose there player base this is quite possibly the best course of action. However, as long as this game is released on consoles, it will become limited overtime, in some way shape or form. due to the nature of the current gen consoles however, that may last long enough to prolong the life of the game to the point where its inevitable. However if we want to see new expansions and content, this is the only course of action. but due to the general ease of the game now and the fact that the level increase and such is pretty much over, I honestly do not think SE plans on releasing new expansion/add-on content.
As for me, I don't have the best specs on my PC, i play the PS2 version on my PS3, i would play the 360 version but due to the many bugs in that version of the game and the lack of wifi in my xbox (I'm not paying $70-80 for an adapter when all the other systems and the new slim have it built in) I do not.