No you couldn't. Not unless you wanted to become the UK equivalent of FC Sion. Had Liverpool appealed to the UK courts they would have gotten us suspended from international competition - Blatter would've jumped at the chance.
Problem was, the whole crux of the case was whether Suarez said "Why, negro" or "because you are black". Given that Kuyt, Commoli and Dalglish all stated that Suarez told them he'd said "because you are black", he was undermined right from the start. As for coaching, don't be so naive - every expensive lawyer worth their salt coaches their clients on exactly what to say in court, particularly if that individual is not a native speaker. As long as the lawyer is not encouraging his client to lie then coaching is perfectly acceptable - if Liverpool's lawyers didn't see fit to coach Suarez on how to present himself in a positive light then more fool them.
I agree that the FA wanted to be seen to crack down sharply on racism, and are probably happy with the outcome, but the way Liverpool and Suarez constructed their case made it very easy for them. Suarez' testimony was contradicted by three members of his own club, and he changed his testimony whilst giving evidence to the panel. Like I said before - he won't be the last person to be convicted purely because his story broke down under close examination. His own actions tilted the balance of probability against him, even tho I agree that the version of events the DC decided on is probably not what actually happened.
You make my point for me in your first paragraph. It is highly likely that a reference to SAC would have had the effect that you outline. However, pressure would have been on to stop Liverpool taking the matter to the High Court with the mere threat of suspending the club from all FA sanctioned activity. Hence my reference to a pyrrhic victory.
As for coaching, go back and read the report again. There are more than one references in there along the lines of "did you not mean this" coming from the panel itself when dealing with Evra's testimony. Whilst the panel chose to take Kuyt's, Commoli's and Dalgliesh's staments as being at variance with that of Suarez it can also be seen as identifying that the linguistic difficulties were more complex than the panel were willing to countenance.
It was and remains a very poor piece of administrative justice.


