I think that EMC collectors kinda break the game very quickly. A single Mk3 array with 19 watches/pedestals is all it takes really. Set a condenser to make red matter or even pedestals and you have unlimited EMC which means you're almost in creative mode at this point. Sure it takes a while to get there but first, collectors reward you for afking/letting the game run while doing something else, which is bad, and second, they quickly render all mining useless, since you'd only get a fraction of what the array(s) are outputing.
I really liked EE for a couple days until i got to the end of it and then i just started playing with IndustrialCraft instead.