I wouldn't mind the normal difficulty of instanced battles being harder and keeping the very easy... very easy. And dungeons could do a bit more too since you have 3 other ppl to pick up your slack and give tips to help you.

But given we have seen in another thread a person cant even get past the very easy instance. I doubt such things would ever happen. They could make the whole thing to press the one button and somehow some way someone will fail.