Tying shematic prices to manufacture time is ridiculous. Not to mention that manufactoring time of some products are just ridiculous timewall. And now we have ridiculous paywall and timewall.
And dont tell me about that it's MMO. No, it's bad gamedesign. Just watch some video from GDC
EVE Devs thought that ridiculous paywall and timewall will save them from Titans and Supercarriers produsing like mad. But in the end this striked them hard.