One minor suggestion: 'Workaround' is not immediately understandable without reading the explanations whereas the other severity options all are, it might be better to call it 'Inconvencience - workaround exists' or 'Inconvenience'.
I have marked the tip approved and made Til's change. If anyone who voted Approved thinks the change invalidates their vote, please revoke or veto and we'll go to a full vote.