There is another possibility: that maintenance really is costing that much at BLT, but every little piece of it is not being detailed out. I'm an AKV owner. Trust me, I'm not happy with the big dues increase for 2015, but then AKV's taxes went up considerably this year, as I'm sure did some other elements such as insurance and animal care. Someone has to feed the zebra, they get grouchy and bite the giraffe if they get too hungry.
BLT has had an unfortunate start in that it was built with a flip-flopped bathroom design in the studios that was finally resolved, and it's possible those costs could now be being passed along. And let's face it, IKEA style furniture is on the disposable side when we're talking the type of abuse it needs to hold up to in a DVC room. I'm sure the taxes have gone up there too. Let's not forget there has been quite a bit of monorail work on that loop over the last year. It all adds up.
The best course of action IMHO, is to go to the meetings, stand up and demand all the numbers. If they're hiding anything (doubtful in my mind) they'll stop any shenanigans they're up to (if any) as soon as they know someone is questioning them.