I say lets Merge Mine! It's security and stability.
I want to merge mine as soon as possible as well. But the attackers could attack while mining bitcoin, so is basically free for them. Now they can attack, but at the opportunity cost of not mining bitcoin. If you're a pool operator, you don't have to tell your users you're attacking another chain with your hashing power (yes, you could get keep all the coins to yourself too), but you can't make your users stop mining bitcoin only to make your attack.