No. We get what you're trying to say, however from what I've read so far, I along with 100% of the posts think you're idea is moot.
Here's why:
If you want versatility, there are 6 of the 8 advanced classes to choose from. Gunslingers (being your pure ranged dps) and Sentinels (being your pure melee dps) are your pure dps classes, for people who want to do just that - dps.
As for 'just respecing and being something totally different' you forgot the gear required to be something 'totally different' ie. that's whole other set of gear I have to maintain. No thanks. Especially for end game pve. As someone mentioned before, I left my pally back in that game that shall not be mentioned for a reason.
No if I feel like tanking I'll go jump on my Guardian or Vanguard, if I want to heal ill play my Sage or Scoundrel.
Sorry, but dumb idea is dumb. Leave the advanced classes variety as they are (fine) and go re-roll another class.
/end rant