Thanks for posting your newsletter! After taking a look at it, I first want to say that you have done a great job with incorporating your brand colors throughout the email, it makes the newsletter look cohesive. Here are a couple of suggestions:
The newsletter is a little longer, possibly adding a Table of Contents would help to let people know what to expect in the newsletter, and allow your audience to jump to their interests easily
What might also help with the length is to tighten up some of the white space (or extra space) around each article
I hope that these suggestions help, let us know if you need any help implementing these suggestions!