Poll also feels that the Bluebirds would probably have been dealt with more harshly by the Football Association than they have been by the FAW.
"The point is if you keep saying, 'ah, well they've acted swiftly, well done,' nothing will ever change and as I said at the time it wouldn't have been such a bad thing had the referee said 'I'm abandoning the match'," said Poll.
"That's happened in Europe. It's happened to Anders Frisk, one of the most senior referees of all time, and I'm not sure that's not the right thing to do now."
Dean was struck and cut on the head by a coin as he officiated the 5 April derby and a man was ejected from the ground and was later banned for life by the club.
Cardiff chairman Peter Ridsdale and manager Dave Jones were also quick to publicly condemn such incidents, with Ridsdale saying at the time: "It's a disgrace, it's unacceptable, it makes you sick."
In a letter received by Cardiff City, the FAW writes: "After taking all matters into consideration, the FA of Wales has determined formal action against Cardiff City on this occasion would not be warranted."
The Bluebirds are expected to make an official club statement early this week, which should then enable a line to be drawn under the unsavoury incident.
David Roberts, 24, from Pontypridd, appeared before Cardiff Magistrates' Court over the incident at Ninian Park and admitted the charge of "throwing a missile towards the pitch".
He was fined £200 and given a three-year banning order, although Mr Roberts denied throwing the coin which injured referee Dean - instead insisting he threw a piece of chewing gum.
It is understood that the quick reaction of Cardiff City in identifying potential trouble-makers in their Ninian Park ground, co-operation with South Wales Police, and banning undesirable elements has been looked upon favourably by the FAW.
Welsh football's governing body has the power to punish clubs, ranging from everything from a fine to making them play behind closed doors.
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