I think this is a poor idea, and much like other suggestions to sell catch-up items, introducing these would pretty much kill the game from level1 thru 50. It's a terrible idea.

Such items also absolutely meet the definition of "pay to win" since you are paying to immediately skip past content that you otherwise need to beat to progress.

The last thing we need in this game or community is any form of pay to win and legions of kids with even less idea of how to play clogging up the queues.