Maybe the gi and hakama are a bit stupid to train in if we are training for self-defence. Admittedly pockets could catch fingers and t-shirts get ripped and trousers could spilt. I'd prefer a standard uniform which is cool, hardwearing, not dangerous and similar to street clothes. One item, the shoes - provides a very different feel to aikido. Also I think it would be useful to train in restricted environments (bar simulations) and uneven ground (kerbs).
I've done some training outside in street clothes - very similar really except things get dirty & can get ripped.
Myabe the solution is just to hav a few outdoor sessions/bar sessions every so often. (there is enough to think about alrady!)