I am not for sappers they are too easy to troll with
I am for sappers, but I feel the same way. There should be ways to prevent trolling, spamming and stupid stick towers. Prevent people from stacking structures atop each other, or add physics to the game.
Otherwise sappers are totally worth it. They can be used as carpenters aboard ships, repair damage in sieges, fortify artillery positions and even fortify villages, hills or river crossings for infantry to defend.