I have some ideas to make it extremely easy to tell when a card in the Wiki has a play as or an errata. The text formatting will not change, you will still see the original ability, followed by the full errata.
My first idea is to change the background color of the label box (Special Ability for example), but none of my attempts thus far have worked. I have asked about it on the Wikia community forums, so if I find an answer to that I will let you know.
My second thought was to change the color of the title area. If you open a page and see the usual blue headline box, the card has no changes. If the headline is say, green, the card has a play as. If the headline is red, then the card has an errata somewhere.
I know a fairly simple way to carry out the second idea, but I want feedback before I go through with it.