I'm wondering if the Southampton lawyers will take this matter further, though Southampton openly admit spying the EL measures have financial implications, and if the FA are investigating as well there could be more punishment coming their way.
As far as I can see there was nowt in the rules saying you risk being kicked out of a competition, it's not like Southampton are doing a Juventus and weren't involved in financial irregulatorities such as false accounting or as you allude, City.
Italian football authorities reach a settlement agreement with Juventus and order the Serie A club to pay a £620,000 fine.
www.bbc.co.uk
Is there even any evidence that Southampton gained any advantage from this nonsense, afterall all games these days are recorded somewhere, places such as Youtube or some sports channel.
Suppose the only problem is legal action can get costly and Southampton are probably happy to just get on with it.
Every single football game sees someone cheating, what the Saints did was just comedy value and a major over-reaction, because governing bodies and the third parties involved feel empowered in this nonsense world we now live.