I understand your sentiment, now understand this.
The older epics were VERY conservative in their feature-set and thusly very hard to move into the future while confronted by game-breaking limitations (to a developer)
Now couple this with the fact that veterans are long-since gone and by FAR not the majority of the available player-pool any given Rappelz developer has at their disposal. It kinda goes along the lines of making lemonade when given lemons.
Plus have you ever thought a moment that maybe there are servers trying 'if not fully succeeding' to give an older feel while utilizing the full power of the 9.1 GS (which I have to give gala props this time around, they made the GS MUCH more powerful in terms of performance and internal book-keeping and features (even if they did seem to make it like to crash with no errors at random (albeit lengthy) intervals.)
TL;DR
They asked which server to play, not which not to play AND they didn't ask for a philosophical debate (we are pretty off-topic) sorry op.