ArenaNet:Guild Wars 2 suggestions/Make party with every proffesion needed

(Discussion)
Much more fun if ONE monk, ONE warrior, ONE elementalist... is in the party. Instead of having (example) 5 warriors and one necromancer. Even better if each proffesion would do its own little task, for example destroy a wall, and only the elementalist can do so. Ore kill a boss, and only a necromancer can do it, while the monk is keeping him alive. and if a player loggs out in the middle of a mission he is automatecly replaced by a henchmen with the same proffesion


 * Why this is a good idea


 * Why it may not work out
 * players will not be able to form parties quickly enough and will get frustated waitng for a team where he is needed.
 * lack of choice / flexibility