I have to agree as well. She's capable, she always seems to know what to do, or what needs doing, she's intelligent... the list goes on.
Mikuru is just a Big Softie type.
Haruhi is the Batshit Insane Scheme Hatcher.
and mai waifu Tsuruya is the Hook-up; her connections, funds, resources, and real estate are always on hand to stage said schemes.
Yuki definitely gets a lot more love.