A bit late, but I can at least weigh in a bit on this. As I believe I've stated before, Infinity just feels...inferior to its predecessor, Monster. You take a look at Monster, and it has a ridiculous amount of content you can play with. Infinity feels more like a rehash of the old Beta A pack; you've got IC2, BuildCraft, TE, and a smattering of magic mods, and that's about it. First and foremost, Infinity is missing Reika's mods, the biggest reason I fell in love with Monster. RotaryCraft and ReactorCraft are just so different when compared to the Big Three (IC/BC/TE); they look different, they feel different, they play different. There's a more well-defined path between tiers, and you can get some insane things at the end. Not to diss King Lemming or TE (he's a great guy, and its a great mod), but comparing TE's endgame, not counting addons, to RotaryCraft and they simply don't compare. You can make your pulverizer faster or give you better secondary drops. With enough time, power, and creativity, you can get RotaryCraft's equivalent, the grinder, to triple an ore every tick.
Monster is like a scoop of rocky road, there's plenty to enjoy and its got a variety of tastes and textures. Infinity is more like plain chocolate ice cream: its better than vanilla, and while it does taste good, there's...just not as much to it. My primary suggestion: break out of the box. Give us something that's actually like Monster. Beta A made me giddy for modded Minecraft, but Monster is where I well and truly fell in love with it.