The LiteCart community and developers often advocate for simple themes over "all-in-one" solutions for several reasons:
LiteCart is built to be "cloned." Many users find it best to take the default catalog folder and create a custom template by only modifying the specific HTML or CSS/LESS files they need. a basic one yourself? Add-ons Templates and Themes - LiteCart
Product-focused / Conversion-optimized
If you want to , go Minimalist Dark .