If we're talking about the Continent map, rogues are useless there as well since they are not targeted first. That may seem like a good thing, but considering the amount of turns it takes to get a rogue over to the opponent, it deems quite useless.
@hint, when the Easter Event started, we started with the old AI, so rogues were not as useful as they are now, but then again, we were using InA units and down, so having a smaller map makes them useful again. I would also rather say that 99.9% of people didn't know rogues were useful in attack; I know many people put them in defense after the Easter Event was over though.