The club won't pursue as that'd make us look like we were out for revenge, and give the potters something to moan about and create tension between the clubs next time we meet.
If the FA are looking at it, then great. Hopefully they'll punish him accordingly, but I said at the time and concur with those on here who say that was a much more sensible and calm Olsson than we're used to.
If he had of gone down but the ref hadn't seen it there might have been a yellow at best - this way the FA can act retrospectively