WP Smush Pro fully compressed but Optimize Images shows 8/100

Hey there! :slight_smile:
Site was auto updated to Wordpress 4.7.1 by GoDaddy. Since then site has been running supremely slow. Installed Hummingbird and did two rounds of compression/optimization and it states all compressed, yet I have a score of 8 on the performance report for the Optimize Images. What am I missing please to ensure I have carried out a full optimization.

I ran all the other functions in hummingbird as well as a ton of other things like deactivating all plugins, re-activating, clearing different kinds of cache, implementing theme recommendations from their system status, Database optimization, but the site is still running very slow. This only happened once the upgrade happened.

Any ideas?

Thanks
John