The answer is very simple though. I don't use mods that load dozens of things unless they have a great feature, and I don't like using them. And there are thousands of players who feel and think like this. Let me explain it simply:
The original mod gives 4 extra furnace levels (mk2-mk5) and even the first tier 1 furnace starts with a production speed of 48. Also 2 new belt and loader sets (splitter, etc. with all its contents). I removed all of them.... I just took furnace 1 and balanced it and added the base productivity bonus that I liked very much. In addition, the recipe, research and production speeds were extremely unbalanced.
I explained all this to you, but if you actually loaded the two mods and tried them, you would definitely notice the HUGE difference yourself and wouldn't ask this UNREASONABLE question.