I would like to be able to sort by opponents rating and result.

hear hear! i'd like to be able to mark games as interesting so i can come back to them later.

the general critique is that it would be cool to have some sort of archive management capabilities.

Yep, labeling will be it. Have proposed it some numerous times whenever I could fit the idea in a reply from other Site Ideas. I think labeling games really really really would be something usefull. A bit the same as like (multi) labeling an email message in Gmail.

Read "New 'My Games' page".