Your solution would increase the page load, reduces the loading speed and this is contrary to SEO.
Please dont provide your users with “solutions” which have a negative impact on their business.

So, whats the solution?

additional:
On all screensizes below 1350px (its even large Laptops) the description of the sliders overlays the slider control arrows.
This, sorry to say, is not the best coding i have seen.

Did you read my initial post??
“slider-descriptions are cut off on almost every page”
So why did you just check the frontpage?