As it stands, the spacemas event, while fun, offers no real reason to use the reactor boost once you have gotten to the current stage of Reactor progression. Not the end of the world, but it is an unfortunate quirk to the otherwise reasonable advice to spread your Giftium around to account for the ever increasing prices to each boost.
None of the Boosts involved apply to power cells in any capacity, as far as my limited testing has shown. I am uncertain as to how such a change would be implemented, as adding a base overdrive speed upgrade directly to the boost itself would in turn increase the charge speeds of the other boosts therein, possibly to an unintended degree