Improve the labeling for the advection schemes. 1-5 doesn't help, and every time I want to change it I have to go to the help file to remind me. Put the name and/or a short list of what it's used for in the dialog box.
Actually, to make it much more user-friendly make a wizard for different analysis types (internal compressible, pressure driven, AEC, natural convection, etc) that automatically pre-selects the right solution details per the help guidelines such as advection scheme, turbulence model, results outputs, etc. This would be pretty cool now that I think about it. (Just let me skip the wizard if I want to.)