After some head-scratching, it seems the epic achievements were rolled into the regular ones, hurray! Now came the thing where it turned out that all ID's for these things have changed. A little digging later has turned up that the pickle block now included in a replay contains part of the battle result data (which is stored separately from the replay).

The fun part about that is that it also contains a field called 'dossierPopUps' which not only contain the battle awards (and the # of times you have achieved the award), it also contains the mastery level if you achieved a new one, as well as the series medals, the kamikaze/etc. stuff. So I took merry advantage of that and included the display of those into the wot-replays site.

For completeness sake, here's a list of ID's: