Personally i find it hard to find a single logical reason to complain about instanced content.
You have to understand that instanced content will always have better balanced battle, created for certain number of people (8 in most cases), giving you sweet challenging gameplay without ability to avoid it bringing 3 parties and raping that same NM in 20 seconds... Not only that but also improves your gameplay cause you would probably have some latency/lag cause of overpopulated area, and i'm not even talking about competition camping NMs outside the instance... Do you really like to compete with those claiming bots? Do you really enjoy it? Well... i sure dont.