Keeping in mind that my sheet is NOT officially endorsed by TR, but it is based upon much discussion and includes direct statements from TR, I would ask you to review this and consider your choice:
From your statements, I would think 5 - All Out would have been appropriate. This matters because it would offer the “Struggle” followup, and give you a chance to consider and answer ‘why’. That helps TR/AT frame the effort and plan going forward.
With the PL/WOL nearly matching, level of fighting you showed, and what I see as a 5 indicates that likely something was not ideal. As mentioned, even a 5 AO is NOT a “failure”. You hit a limit. What matters next is to understand why.
Considering that this was “Productive” and only a small increase from your existing PL, would you consider this a workout you were prepped and ready for or were you off for any reason (Sleep, stress, food, etc.)?