Glad to hear things are progressing. Some things that would step you up to another level, IMO, would be:
a much cleaner and modern default theme. Looks like it's from 4-5 years ago. https://martica-demo.myshopify.com/ would be a good example.
Subscriptions. The only other software I can find that does this right is Lemonstand. All others you have to either buy a module or pay crazy amounts for services. This would put you apart from the rest.
A great and easy checkout process (1 page) like shopify and even PS 1.7 has. Check out chewy.com, they do it right.
A better customer experience. Should be easier to re-order items, see your past purchases more cleanly, manage cards, etc etc.
Just some thoughts.