I hate the whole static group/lockout format of Coil as well, and wish it was more like CT where it only locked you out of the loot instead of complete access of the dungeon itself. Too many times have I seen "Oh, *insert person here* can't make it tonight, guess we aren't running it this week," or "*Insert person here* stopped playing, now we have to find someone else or rearrange one of our other static groups." It's extremely inconvenient.

And as far as merc-ing goes... I don't know why that's not illegal in the first place. It just seems like it would create too much opportunity for exploiting people, and it creates a more elitist environment. "Oh, you can't beat Titan EX? Better farm up that million gil, noob," etc... What happened to just being able to help people?