Suggestion - Role swapping in instance

[Zfz]

Tank enters into the dungeon and swaps to DPS.

If it's only for in-progress dungeons that have been waiting for a replacement for over 1 minute (must be longer than the Commend count down), then why not?

Regarding the proposed system:

If a DPS has enough gear for the content in the first place, why would he/she queue as DPS? I would just queue tank. Why would anybody choose to queue half-hour DPS if he/she has a geared tank available for instant pop?

The only logical situation is when leveling (e.g. have 50PLD but want to level 19ARC) and gearing (e.g. have iLv120 PLD and want to gear iLv100 WHM). In which case the system necessarily need to allow for two things:

• All experience earned are awarded to and calculated according to the job you queued as and its level.
• All loot rolls are determined by the role you queued as.

Otherwise swapping out of DPS mid-content beats the whole point of queuing as DPS in the first place.