When the incident was being reviewed by the ref and TMO I was thinking that, yellow or red, it was the same for us as the aggrieved party given how little time was left in the game. For the rermaining duration of the game it was irrelevant to Bath what colour the card was, either colour would result in the same effective punishment for the game in which the incident took place.
The old law student in me thinks this is unjust but I can't come up with any further sanction or punishment that might change that.
It could just be that I need to get out more.