It is easy for fans to be upset at a company for making changes to a product that those very same fans enjoy. How ever, when those fans are leaving that product on the shelves, buying less and less of that product year after year, that company will not survive.
Fans, being away from any financial responsibilities that the company has, can still complain that if you only made that product "new and improved" (by making good stories, for example) then the product will survive, but that is not what the past has shown us. Even the product with fantastic ingredients, new labeling and a lower price will not bring buyers of that product back into the fold.
Sure, the new and improved product (now with added Grant Morrison) will obtain more buyers, but these buyers are already buyers of a similar product anyway. The total amount of buyers is still lessening each year.
Bottom line, I don't blame DC for trying this. Their readership was dwindling, they were constantly losing sales and the future was looking grim. Yes fans are not going to like some ... most of the changes. That is because they were fans already. This company is trying to get new fans. Trying to make more people love the books and characters that we have all loved. I for one, praise them for it.
Before this "relaunch" I bought 2 or 3 DC titles a month. I am now up to 20 (Still wanting to drop it to a at least 10), and while I am sure DC is happy they got me to buy more DC, they are honestly trying to get people not like me into the stores. The people that have left comics years ago and of course, the people that never had the joy of reading comics.
Go read some of the comic shop responses to this new DC effort. A lot of owners are seeing an increase in DC sales (by a huge margin), but more importantly ... most importantly ... they are seeing a lot of NEW faces coming into their stores for the first time.
Essentially, my way of thinking, and it certainly could be flawed

is that if you can double the amount of readers, increase cash flow, obtain the money to hire better creators, it is a lot easier to concentrate on making good stories ... with the characters us fans have loved.