Hi jocasio ,
Thank you very much for your post.
Changing status texts or creating statuses is not what we offer in the free version and never will. We use the same system as WC. I am sure your dev will be able to play around with it. However, we can not support you if you do custom changes to the code.
PS: I am guessing we need 3-4 months for the Purchasing premium addon with several new statuses added.
Pavel