We do have cost on the blueprint card in the top right, but it's probably a little too tiny. And if you hover over a blueprint card (or upgrade point) the cost of the action points light up on the action point dots. But I agree about the point cost on the upgrade menu, it was another thing on our nice to have list to redo the entire menu. I think half of the upgrades don't even have descriptive texts! Oops.
Thanks for playing it a second time, we really appreciate you taking time out of your day to write such detailed feedback and we really enjoy reading your comments! And thank you so much for your kind words. You and all the other kind commenters are absolutely making my day, week, month, probably even year.