You are forgetting one very important thing dude (dagoro), that is none of the captains used kidoh. It was just bare sword play. Don't you think using kidoh could have led us into a more interesting scenario.
I am not against Ichigo using Bankai people but if you see every captain uses bankai at some point but NOT AT THE BEGINNING OF A BATTLE. Here Ichigo going Bankai prior to every fight it becomes a common scene isn't it ? If you compare Ichigo's strength with other captains he has the hollow form thats what sets him apart. Otherwise he's very ordinary. Teaching him kidoh could have closed the gap.
Originally Posted by Dagoro
Again I ask, how many captains can actually beat GJ and Ulquiorra based on feats ?
Lots of them in fact. Starting with yama ji who has showed us the slash of his ruujin jakka. I don't think he needs pulling bankai out against any espada EXCEPT AIZEN since he has wide range of kidoh attacks up his sleeves.
Next on the list is sunshui. We see him hitting stark with the weird game of his of choosing colors. He didn't even say "BANKAI" so that was not his Bankai at all. If he can defeat stark he can defeat no. 4 or 6 with his eyes closed. No matter how many resurrection this ULQ guy has he'll be blown apart by the color game.
Sui fon purely because she has a zampakhtou which needs two strikes to kill. Plus she is the second squad captain. Second squad members have to have special skills in hand to hand combat to tackle criminals (which is kidoh btw)
Byakuya (He is totally cool headed guy). He blew zomari luroux like a fly. Though he used Bankai at the end he gave the poor guy a taste of heavyweight Binding spells.
Guys, You must agree to the fact that when we are discussing shinigami kidoh and Bankai are both skills. And when it comes to Ichigo he has one ace short in his deck of cards. The creator also realized that I think and thats why 2nd hollow came into the fray.