I think it's worth noting that I haven't seen Legolord insult anyone yet, and two people have called him a douche and an asshole. I disagree with him in regards to tunneling, but I would never insult him like that. He gives an argument, not a flaming row full of ad hominem attacks, persecution complexes, strawman ploys, diverting an argument because you're losing, and more spelling errors than a chinese-to-english take-out menu.
I've already posted twice on this today, but I'd like to see Combat Engineers- Siege Engineers, Masons, Mechanics, Miners, and Siege Operators. It's not so much I think digging is necessary, just that I want it with everything -else-. I want everything the game can throw at me thrown at me, and I want to triumph over it. Sieges need to be pants-wettingly terrifying, and they're not. If I can do it, I want the game to be able to do it. And I can sap a goblin tower into a dust cloud at the bottom of a 15-z-level drop, so they should be able to mess with me if I can't take them down and stop them.
You can't see how to win? Section off your fortress with chokepoints chock full of traps, doors, floodgates, narrow corners, pit-drops, drowning/magma rooms, and hallways full of fortifications that marksdwarfs can come up behind and shred the enemy from.
You don't want to play that game? Turn it off in the init file.
Heck, I personally didn't even want any sort of dirt-fill in for tunnels, just shove walls in them and be done, but heck, if we're gonna do that, but I don't see an issue in letting others re-earth up the place- I just won't do it.
I want the goblins to give me a run for my money.