The only time I can ever see worrying about getting lean as being detrimental is if you haven't built any appreciable muscle yet. This is very rarely the case (except in many teenagers I see), as how much muscle you ultimately want is a personal issue and no one can seriously tell you that you're not big enough unless you're aiming to compete.
Forgetting my experience as a competitor, I will say that a lot of my perceptions changed when I first achieved single digit bodyfat levels vs what I THOUGHT was very lean conditioning earlier in my training career. I can go through old pics of myself a couple of years before I ever stepped onstage, and while I was fairly lean at the time, the sense you have about your body when you reach "stupid lean" levels really shifts a lot of your thinking.
I like to tell my clients who compete that when you come out on the other side of a contest, NOW you can truly see the Matrix. Before that point, you're just guessing and repeating what you've heard, no matter how smart you may be.
If you've never been as lean as you are now (or should be in a few weeks), I say you owe it to yourself to stick it out. I'm sure you're going to hear a few people talk about risking losing muscle, but let me tell you that as long as you're being fairly smart about your training and nutrition, a lot of people (usually non-competitors) overestimate how much muscle you can/will actually lose on a strict cut.
Besides, once you're at the macro levels you will be at, and you slowly start working them up, the overall leanness you've achieved doesn't vanish overnight and will actually linger quite a bit as you start filling out and packing on more size. If anything, it will give you a much clearer understanding of the actual #s you need to make progress as you come out of the cut.