I think you can enable the regular sized menu in Mutiny by installing Dconf Editor with
sudo apt-get install dconf-editor; then after opening it make a search for 'brisk'; and then after clicking the entry look for the bottom line which reads "Window type". After making sure "Use default value" is off, change the "Custom value" to Classic.
Edit: The above method didn't and doesn't work for me in any of the layouts unless I also remove Brisk Menu from the panel and then re-add it.
&& regarding the actual feature you want, from the looks of things it seems the Dash style menu can only get better, so with some lobbying, there's hope.