I am one of those who have spent lot of time on Guest posting and looked at it from many different perspectives...
As a matter of fact all my post are good (IMHO), but I can churn out only 2 or 3 masterpieces per month.
The number in this time seems like your posts are really worth reading for your niche and you deserve the wider eye balls then you are currently getting but I still think that Guest Blogging to high Authority and Trafficked websites for you is important and you should offer your content to highly quality blogs in your niche.
At the same time you should have some attraction on the blog that grab the readers and visitors attention and make them visit again and again...until your over all authority go increased in your niche.
Once you have kind of name then you can always skip the guest blogging to 3<sup>rd</sup> party websites but at the same time you will get offer from other bloggers to allow them to write on your blog.
So, Guest blogging allow you to build your authority and chance to get more content on your blog for free.
I think Guest Blogging does not offer you links only but it offers you to brand yourself in your niche which is more important than anything else.