The Normal mode will drop same ilvl items as toc5 heroic. I can imagine this will be a hard instance, but still pug'able heroic with good geared people. Why?

I don't really think anything 5 man wont be pug'able with good geared people, because there's not many people to count on. Say if it was 25, NOBODY could make a singel mistake, because moving wrong or something similiar would wipe the hole raid. That would be un-pugable.