Thank you for reaching out to the Community about your emails! I apologize your click rate has decreased while using our newer templates. I took a peek at one of your recent emails and can see that they look great. The one suggestion I would have is to put your links in a button block. Using a button block rather than having your link as regular text will allow it to stand out more. In fact, here's a link from our Help Center with more tips on how to Improve Your Click-Through Rates.
I hope this helps!