I need a feature for saving draft posts in my account in some sites like Math.SE. I use different computers and sometimes have several questions to be asked once I find a computer with internet access. At least I don't forget them if I can save them in my account instead of discarding them before 20min obstacle or similar rules.
The purpose of these sites is for when you've exhausted all research and attempts and still not been able to solve your problem so then post a question. Therefore you shouldn't ever really have a batch of questions to ask.
If you do then you probably haven't done enough investigation to solve them individually already.
Being able to batch then up ready to post would just encourage people not to do enough investigation, people will just write their questions in advance and post them all up.