Yes, the server name is "allmaps", but it's not "alloriginalmaps"
Anyway, you can say that it is always all original maps, because none of the modded maps are going to be implemented on permanent basis. What's wrong with putting one random "modded" map in the maplist once a week or a month? It helps to slightly randomize all of the known classic maps we've been playing for years.
Of course, some changes may be successful and can improve gameplay, other may be not. That's why it's being tested only for short period of time to see how it will show itself in game. Some players would like to add additional vehicles, others would like to remove it from particular maps, so why not listen to our players' opinion? Even you made one suggestion!
I used to rename modded maps, for example, when main bases were swapped on hastings, but I don't see the reason of doing it for minor changes such as making one flag neutral or replacing slick with gunship. Even if I rename any particular map, you will not see it on maplist in game or even when "modded" map is loading, you can notice it only on gametracker when it is being played, that's how this game's engine works... So what's the use of renaming it?