May good points here.
Another one, which is pertinent to where I happen to live, is that a badly skewed buck:doe ratio means that the available bucks are running themselves ragged trying to get all the does bred (it has already been mentioned that spreading fawn births over a long time frame has disadvantages). This results in bucks being in scant condition when going into the lousy winter weather and having a hard time to survive through to spring. With this occurring, the ratio is even further reduced.
Our own f&g department doesn't seem to twig to this very well and allows only very limited doe hunting opportunities. Guess what kind of shape our herd is in.