I personally find it enjoyable to travel through maps and explore different environments within the game. For example, why have Flaming Mine when we can get rid of it and relocate the mobs to Burning Rock? Forget the ashy ground and river of lava unique to Burning Rock, it can be removed entirely since it is far too large and contains recoloured mobs.
Roumen has always been Core's true community centre and completely stripping the surroundings in favour of a small corner within Forest of Tides sounds awful to me. A town requires space because it's where everything happens. I don't think the area dedicated to the town part is sufficient to house 35 NPCs, *hopefully* many players, map objects (buildings, decorations, etc.), an empty square for events and gatherings. You won't see Roumen blanketed in snow anymore either.
It's been suggested that removing these maps will reduce server load and latency... The 25 different mob types will still exist but instead of being separated amongst four maps, they will all be jammed into one map the size of Kahal Plains. If we were to host another event similar in nature to the Mr. Frost event, that would only add to the number of mobs on the map.