By complete I don't mean a set of techniques that can handle all and every situation with super human ability. But, rather all the tools needed to draw on. You don't have to go outside the art to get something. If your lacking something it isn't because Aikido doesn't have it.
I agree with this completely. from experience in the dojo,in myself,and on the street. Aikido has not shown me any holes in itself.
I have definitely found a few in my comprehension.
This isn't to say don't do something if you feel a want to. It means you don't have to do it because it is missing in aikido. Maybe it is simply missing in one's practice.