I think you're thinking too much like a posts-on-the-boards-and-goes-all-the-time-frequent-visitor. Most people don't go to WDW all of the time. They don't have drawers full of MB2s. Or they do have some MB2s but just like to collect them. People were already paying $50+ for Limited Edition MB2, so I don't see this as the shocking "price increase" that everyone seems to be describing it as.
I don't know, I think they're fine. A minor upgrade with a minor price increase, on average. They're not Earth-shattering, but they weren't promised to be and they're not priced to be.
These bands are probably number 98 on the list of the 100 most blinky-flashy-paterny displays in the parks. They're not going to trigger any seizures.
I was coming more from the standpoint that MB's used to be included with your room, and now they start at $10/each (I think, I haven't needed one for a while. I continue to use the last one I had to buy, a plain blue MB). Bob used them to create a revenue stream.
Update: According to ShopDisney, even plain MB's are now $20. Good grief...