Thank you for taking the time to write this feedback. We will consider it and try making variant translations editing more convenient. In the meantime, the problem of editing variants can be partially resolved by the feature of product exporting. It allows the content bulk editing inside one file and after editing you can import this file back to your store. More details can be found here:
But we are sure to implement a more suitable solution for this case.
If you need any assistance, don't hesitate to contact us.
Our Support Team is available 24/7.