Can my query be meh, and still get a response from an agent, and if my query is meh and I get a response from an agent, should I be worried?
The goal for your query letter is not to be perfect. The goal is to entice an agent to read your novel. If an agent requests pages, your query has done her job and calling her "meh" is kind of insulting.
I've requested pages when the query wasn't all that great and been happily surprised. I even signed one or two of those books, but I forget which ones.