Regarding maps with multiple games, I think the Gameplay Quality vote should be based on the best one of the games (meaning that, if I add a bad variant as a game inside a map already having one or more games, that should not decrease the Gameplay Quality of the map).

I would suggest splitting quality between Gameplay Quality and Graphic Quality (possibly also a third column for how good sounds are, which would be left empty if the map does not have a "sounds" folder).

These are such different things that I always find weird to imagine how can you mix them together in a single quality vote.

Of course, judging Graphic Quality is much easier than judging Gameplay Quality.

This would especially make sense if map-skins come back: map-skins can only be judged for Graphic Quality but never for Gameplay Quality.

@Cernel

A cool column to have would be the year when the map was originally released, so you could have the history of TripleA in an organized list. However, I guess this information is not any longer available for most maps...

The closest to your suggestion is minimumVersion

This gives the minimumVision to play the map.

However, AFAIK the latest series of releases fix so many of 2.5.22294 problems and runs faster and occupies less RAM. Why run an an old version?

My 2c, not worth putting it in a table.

.

As a 4th column, it may be good having a "Games" column, meaning how many games the map contains. This would be probably a 1 for 80% of games, but it may be a good information.
However, I'm not sure if telling how many games there are in a map is really that important, so I'm not saying that I suggest to add this 4th column: it's just an idea, but I'm not sure if it is worth the addition. Opinions?

Again my 2c, not worth the effort/white space used.

A cool column to have would be the year when the map was originally released, so you could have the history of TripleA in an organized list. However, I guess this information is not any longer available for most maps...