1: Leave the default product entry in tack. (NopCommerce V4.50.1) with a theme
2: Create an Admin Widget Plugin to provide a better product administration.
Functionality may include but not limited to:
1. More search options then the current defaults.
2. Fix the mundane Specification Attributes section of product.
3. Further enhancements can be discussed.
Most important is provide the source code not just a compiled zip file.
If you want to create it and sell it as plugin, No need in responding.