There are two issues that I find problematic in the Mash Designer. The first is that when you move the sliders by clicking on them with the left mouse button and dragging they do not move smoothly as in the previous version, rather there seems to be a delay and then they just jump. As such, it is difficult to “dial in” a specific volume value using the mouse. The second is that if you try to adjust the volume slider with the arrow keys to “dial in” the volume, the temperature slider does not move along with it, as happens when you adjust the volume using the mouse. As such, when you increase the volume (of the strike water for example) the temperature remains the same whereas it should drop (as it does when you move the slider with the mouse). This will give you an incorrect (usually to high) strike water temperature.
Version 2.01
Vista
Sliders _do_ respond to keyboard input. They do have to be tabbed into focus before the keyboard can control them.