The real question is, what is balanced? If you keep asking yourself that question, you will always be testing your units against their strengths and weaknesses, and if you find that a particular unit absolutely shreds what it's strong against but has a close match with its weakness, then it's unbalanced.
AND FIX THE DESCRIPTION! I HAVE NO IDEA WHAT'S IN THIS MAP!!
Without a proper description, I am forced to actually wade through all the posts on the map to find a review done by someone who has actually played the map. Fortunately, someone has done that on the first page, but according to him, the map is not worth my time or download limit. So, by not filling out a proper description, we have no idea what you intended to do, and therefore cannot help you at all. By not telling us what features the map implements, you don't exactly 'wow' your audience. By putting the bare minimum in your description, you have left all your promotional power to the first person who reviews your map, who found it to be unworthy and rated it a 1/5.
After all, it's pretty random when you read the description and just see 'added option to allow Ironforge to open its gate' as the most informative sentence of the whole description.