Hi there,
It's a fair point, thanks for the feedback. I'm not sure it's worth the effort to change however - calcite is a gate to a lot of useful tech and recipes, I think it's suitable that this is further encouragement to progress in that direction. If I were to go down this route, I probably wouldn't add an extra tech, but have EM Plant as only requiring Holmium Processing as a prerequisite, and moving Superconductors, Supercapacitors and Electrolyte recipes to unlock with the EM Science Pack. Then change the unlock trigger for the EM Science pack to be to craft an EM Plant or something.
That would work without any additional techs (which is my preference, to avoid the artwork :) ) - but still not 100% convinced it's going to make all that much difference to a playthrough. It would keep things more flexible, which is a positive, but not exactly for long... I'll think about it some more.
Thanks
Jack