Dire didn't want it as he thought it would prolong the startup-progression. Though I can't really consider that as valid as he spends a whole lot of time mining offline and has chests full of extra materials just after a few episodes anyway.
Actually I'm fairly certain his reason was that he wanted to play the mods as their makers intended them to be played. He is friends with a large number of mod makers.. it would be a bit awkward if he was talking to them
"Oh Dire, how did you like that X feature"
"oh well I didn't actually use it, Greg nerfed it into obscurity so I used Y modders Z feature instead"
Minecraft, and modded minecraft even moreso, is NOT about progression. It's "heres the tools, now have fun and do what you want" Trying to shoehorn a progression system into that (unless you're damn good at coding/design[Flowerchild]) is NOT going to work. Greg fanboys may love it because progression and tedium is exactly what they want. But Gregs idea of how the game should work does not fit with mine.