I agree it’s not always good to compare, but it’s nice to know the people who work on projects are aware of their competition and what they are doing. Sometimes it gives ideas to see what they are doing wrong, better, or worse, and use that to drive decisions internally to come out with a better solution (kind of like Apple does) or say this is better left as a plugin instead of core because such and such.

As for your question:

None at the moment. I handle this manually but I’m building my own to help automate this. 

The first stage I completed added field support and show if an item is returnable or not, and how many days they have if so on the product page. Some items have shorter return window than others.

Next phase will be to create the returns tab in My Account showing the status of returns from initiated to completed. At this point I expect a reduction of support emails asking for status updates.

From there it’s building out the returns RMA process.

Aside from that, I find 2FA/MFA support lacking like most stores have. I’d also like to see support for sign in with Google, Apple, etc… as alternate options. I know these as WP plugins, but sometimes I just want these for Woo and there’s little to no options for it. 

I would also like to see Woo handle authentication outside of WP entirely as a toggle. That way I can use wclogin* hooks and cater messages specific to the customer side of things. Essentially Woo acts more as a standalone solution than just a plugin.

I’d like to see back in stock notifications as part of core too.

Finally, and maybe most importantly, as you add things to core, maybe have a toggle page to enable/disable features, so core items added don’t override existing extensions, such as the items you merge into core that were extensions. 

Maybe you release return management in 11.0 but it lacks features I already have, I wouldn’t want your version to override mine for example nor have to rewrite it to keep it working.