The Companions is the worst guild in the history of The Elder Scrolls. The Fighter's Guild in Oblivion is infinitely better.
You haveto be kidding.. I mean really? The FG in Oblivion? The questline that has you delivering weapons to a couple of fighters that went ahead and assaulted a goblin infested mine unarmed, beacuse... i guess they forgott to bring them? I don't know, it dosen't make any sense.
And then when you get there, they start dropping hints on what weapon they prefer with the subtly of a bulldozer, where choising the wrong option means you are roleplaying someone with braindamage or you just want to see the dissapointment on their faces as the 300pound armorclad killing machine infront of you is too gosh darn shy to acually speak up. And as a nice cherry on top, if or rather when one of them runs into a trap and dies, it's obviosly your fault you need to recieve half of the reward.
anyhoo....nerdrage aside...
I agree with the OP for the most part and had a simmilar experiance.
While the lenght of the guild questlines didn't really bother me much since i never activly persued them, they are very short and i can imagine someone who wants to complete the entire thing before moving on to other things isn't going to be very entertained.
Maby if they made the radiant quests mandatory between diffirent story segments it would artifically lengthen it for the people who can't help themselves, but then the boards would like be flooded of complaints of beeing forced to do them... awell.
For the next game i'd prefer to see the story not only longer, but partially seperate from guild ranks, where promotion is achived from doing radiant story quests and fuffilling stat/skill requirements aswell as certain milestones in the story.
And as for difficulty, the game can be fairly challangeing aslong as you leave the crafting skills alone, seriously, the person responsible for balancing them needs to be sent to bed without supper..