Engine25, I like your idea about temporary buffing defense, but seven shield tokens mean that technically, there must be a moment when all seven are needed within this expansion.
If whatever upgrade the tokens are for could be used on another ship while the Jumpmaster is also being used then that would be reason enough to include them even if the Jumpmaster wouldn't be able to get to 7 shields when using it.
That is a possibility, however I am guessing this upgrade for these shields will be scum only. Every scum ships comes with there own shields so if it were meant to say, replenish shields and not overcharge, I think you could just use the tokens you already have with whatever other scum ship you ran.

