It's not possible to switch the form to the tabbed design, but we made it possible to include almost all of the admin fields via MultiMerch product form settings. The ones that we didn't include aren't meant to be used by sellers as they affect the store in general, such as layout settings and such.
If you need custom modifications of our modules here you can buy additional service, however before purchasing this item please contact us firstname.lastname@example.org to determine the range of changes and total price
Upload default Product form features to sellers form
As admin if i go to Home MultiMerch Products then add a product i see multipl tabs like Data Links Attributes Discounts ext.
How to add them to regular seller product form? route=seller/account-product/create