One reason why ROTU was so nice was 1 person could play the map. I don't know about you guys but I filter my servers to show the busiest first. That's usually because most mods require a lot of people to be a good game. ROTU could be played by one person, and more people would join as they saw the game get busier.
There were a couple of fixes that could have made it more fun. Such as after a long game, the server would crash and restart the same map you just spent the last 2 hours playing. That got to be a bit frustrating.
Also if once a map was played it didn't appear in the vote for the next few maps it would have more variety. A few new maps and a couple of the favorites like Dust and I think people would not have requested it be changed.
Please think about bringing it back.
Thanks