Yes,
In fact, I've gotten so complaisant that I've avoided uploading the rollback version which ends up having angry merchants. Always upload a back-up APK in case your update fails, your merchant don't have to re-install the app in order to go back a version.
You said "no" but it sounds like you meant "yes, do submit a rollback version".
Depends if you were answering the question in the title or the final question in the post :).
It's up to you whether you want to submit a rollback version. I think it's recommended but ultimately only you know your confidence level in the new code. I'll ping someone about why one was approved and not the other.
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