Thank you for using our services.
With our Sitefinity 5.4 release we have addressed the frontend performance, with one of the improvements targeting namely the amount of scripts that we're loading on a page.
Upgrading to that version would bring the above mentioned and many additional improvements, features, and bug fixes we've introduced.
Please do not hesitate to let us know if there's anything else we can assist you with.
the Telerik team
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items