I still like jersey cards but liking them isn't the same as valuing them considering what the swatches on the cards may or may not actually represent - from I read on the Blowout Cards forums, Panini's high-end football cards product [one that costs $1,349.95 for a pack of 10 cards] was exposed when suspicious looking swatches were inserted into memorabilia cards.
When there is big money involved, the fraud trickles down from the big time collector of actual memorabilia being duped to a card collector - animated with the cool things you can do with a trading card.
I used to laugh when bloggers would occasionally rant about the COA / fine print on memorabilia inserts cards - but with the Authentic Sports Investments / Bradley Wells game-used scam was exposed in 2012, the New York Giants memorabilia lawsuit and now this, it showed just hard it is to secure a game worn jersey / uniform from any number of professional athletes, chop them up and get assorted swatches on cards.
If game used memorabilia cards have to be created, make it where it's easy to get things right - get items direct from teams [with good provenance, not just a blanket 'it's good' seal of approval] from specific events / games / workouts.
Even being right most of the time doesn't mean it isn't flawed or the process is clean - so more care should be taken to label things clearly so there is no confusion.
In the end, maybe the focus should be on manufactured memorabilia cards - so no one has to worry about where a particular swatch came from.