Last time we were speaking with some friends and came to the same conclusions as you @HBG-GW-Enthusiast : maybe luck has a great (maybe too much) importance in the peacetime rolls.
We think about the same idea : still having a d6 roll and a fix number to complete the peacetime roll. You propose a d6 + 3 ipc, in our group we didn’t know what is the good number to complete the peacetime roll increase, because we maybe lack some experience.
To conclude, we support your point of view, less luck is more fun. By adding a fix number you just suppress the “extreme values” like 1-2-3 and 10-11-12, witch seems good.
We also get a similar discussion about tech rolls because they seems to rely too much on chance. For example, the wartime economy could have a lot of impact in the game.
The problem isn’t the too powerfull effects of the techs, but the proeminent presence of luck to get them.
Also, maybe the fact that this game is 3 sided team is meant to counter the presence of too much luck ? idk thats just a thinking.