I'm not sure if this answers your question since I'm not sure what the implications of your workflow are, but I got a huge jump in productivity with Oh My Zsh.

I'm not sure if this answers your question since I'm not sure what the implications of your workflow are, but I got a huge jump in productivity with Oh My Zsh. It has a bunch of features like tab completing past commands, it includes various shortcuts, etc. It's also compatible with bash.