https://gfycat.com/HilariousBlissfulBluebottle
This gif demonstrates a flash shield bash, which is when you do a shield bash right as your attack speed changes.
If you do it, as shown in the gif, it's possible to start charging weapons in the middle of the bash and it looks friggin' sweet.
My suggestion is to make charging in the middle of a bash a proper mechanic. Imagine charging into the middle of enemies and immediately following it with a levi charge. How sweet wouldn't that be? I'd be shield bashing all the time.
while I believe more could be done with bash and dash, this sure would be great, an exchange of defense for a good buff like this is a rather nice Idea.
Thank you for your time.