OK I just realised why not renaming would be an inconvenient (bad) thing in the long-term:

• Those who would want to cycle through the levels all at once (on their own, locally) would either have to make a levellist or have to type in the specified levelname each time.
• Or, if the next level set only gets changed, it may screw up the order of levels that were in a levelpack, making it inconvenient for those who want to cycle through a pack that's not the bash.

So...nevermind then.