Would be handy for the performance analyzer in the build area to be a panel always available (even if initially minified up in the top right or whatever). Currently need to look at an engine to find the button to open it. It would also be handy to then include general vessel specs (mass, width, height, etc) in here as a lot of the time we try and build things to a specific spec.
Performance Analyzer can now be opened via the menu or by pressing 'O', which is the default key binding, but it can be changed in Settings -> Controls.