I would like to upvote or downvote some questions without going to this question, because of title and short part of description are sufficient for voting decision in some cases.
I suppose to replace following old form:
with new form:
No, you cannot judge a question quality from the summary alone.
Sorry, but I feel this is a terrible idea for that reason alone.
You need the comments, the full markup and the answers to judge a question fairly, not to mention to take a moment and vote for any answers too.
We require you to, you know, actually read the entire question before you can vote on its quality. There's some pretty good reasons for this:
You might read the question in its entirety, realize that there's an awesome question trying to get out, make an edit and the question is a success.
You might read an answer to the question, realize there is more to it than you thought, and up-vote it instead.
Those are two pretty compelling reasons that actually happen every day to keep the vote buttons on the question page itself, and we're unlikely to ever change this.
As API V 2.0 expands, some additional write calls will probably creep in, but I have no idea if voting would ever be part of that. That's a use case to consider in that regard, even if just guarding against it.