perchance, would you consider removing the strange matter capping growth to only doubling after you see the ending/credits? as there are no milestones to skip after that point.
I'm afraid not. Because of how strange matter functions, having 71,332 of it will cause the growth amount to exceed 1.78e308, after which most engines round the number up to infinity. Even with just 10,000, you'd get a multiplier of 1e42 or so, which is around ten orders of magnitude larger than the known universe (which was why it was nerfed before the final upgrade).
I think doubling in size is a fine amount of growth. After reaching the ending, she'll take less than a thousand more clicks to outgrow the math itself.