This comes up often in the queue. People write bad short answers. My mouse wanders towards the downvote button, except that it's hidden in the LQP review queue. The post certainly doesn't "Looks OK". I don't feel like pressing "Recommend deletion", because: (a) the post fits none of the template reasons described there (b) I think that instead of having their answer silently deleted with "No comment needed", the poster should be given a chance to see that their post is being downvoted and be able: to call-out as to why, bring other members' attention to that post, etc.
So, what should be done in such cases?
Note: This isn't a problem of illegible answers. The answer posted is just one or two lines, incomplete, and bad. If it was illegible, I would choose the "Edit" option, but this isn't the case I'm discussing here.