Corrections, corrigendums, and retractions are only useful if you see them.
How about if Paperpile were to check for those when you load a PDF of a paper. Is that possible? Could it send a quick query to the journal website to see if any has been posted and bring it to your attention if one has?
It would help ensure that these sort of things are brought to your attention now, rather than some reviewer pointing it out later!