From the article:" In a later TV interview she noted that the Trudeau fundraising rules are “much more stringent” than what is in the Conflict of Interest Act, which she enforces as an independent watchdog agency. She said those rules should be added to the federal ethics law so she can crack down on special-access fundraisers.

“There’s a whole group of rules in the Prime Minister’s accountability rules that could be nicely put into the act,” she told CTV’s Power Play."
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The Liberals are following a higher standard that the EC likes and its a set of rules she can't enforce yet, but nice spin try. 
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The central issue here is whether or not the fundraisers are "preferential". They are not. Anyone can attend, no one is excluded. Just like with any CPC or NDP fundraiser.
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Thats why there is no issue here whatsoever. They are not preferential. If it was invite only or some person that wanted to attend was barred, then you'd have something, but you don't. Thats why it won't stick.