"This hard thing is just as rewarding as this easy thing."
Every 25 has a better 10s inside it. We held out as long as we could, but at some point it was convert to two 10s and get way more progression that way. Simply no choice about it, very basic economics.
If you have a job, think about it this way. Pretend that instead of going to work and doing whatever it is that you do, that you and two of your friends could make the same amount, for the same amount of work, with LESS risk. You'd probably do that- you'd be a fool not to. This is very close to that.
But for Blizzard to change it now would devastate their raiding community. Only an announcement like "cross server guilds" (aka, realm mergers in all but name) delivered simultaneously could possibly abate a portion of the rage, and I'm betting at least 10% of raiders would honestly and legitimately quit, having viewed their WoW as having been shut down.
Blizzard should take this lesson, which was available for them back in ICC when we told them this exact thing would happen, and remember it when designing future MMOs.