I think a new player is better off going through xavier first since the gear they get from that chain is so good and can help them get to 67 where they can then wear crimson gear. Then go back into HOS / DL / ZS for your set skills.
ROM broke the old quest progression gear with those dungeons - and your gear choice really starts to narrow down. At that point stat progression really took off. They have somewhat corrected it with sardo graffu easy.
Edit: it also helps to do that so you can save up the old quests zones for when the next dbl xp comes out. (You cant get to max level on all 3 classes with the current quest xp provided)
I disagree. I think Xav gimps new players if they use it to level their primary class. Here's a basic outline of what happens.
New play joins Rom
New player asks what is the fastest way to level
Someone says I'll port you to Xav you can be level 50 in 2 days!
New player levels to 50-52 in one weekend in Xav
New player spams that he's a rising star looking for a guild
New player gets in a guild.
New player goes to DoD with his guild
New player is one-hit by first boss.
New player QQs because his 8K life wasn't enough to survive