Glad to hear GatorCache is working out for you with the new WooCommerce version. Products and their associated archive caches are designed to be refreshed when products are updated, so you don’t have to worry about “delete cache” every time something is updated.
Regarding your htaccess rules, we don’t include optimizations like that in the recommended Apache rules. Sometimes a host or server will already have something like this in place.
Looking at your expires rules, they look about right. However, I’d remove the “ExpiresDefault” directive, it’s not needed and could cause file types that you would not want cached to be cached by the visitor’s browser. Usually I’d set a higher expires, especially since Worpress appends the version to scripts and such. Other than that, it looks like you’re good to go.