Wow these changes are way more extensive than I was hoping for! Been flying around for a bit now and this is awesome (though I am paranoid I will misjudge something and crash straight into an asteroid or station). The reduced maneuverability with drastically increased engine acceleration will take some getting used to.
Only thing I feel I need now is, funnily enough, a prograde marker ;D Can be a bit tricky to judge how quickly you're changing direction sometimes.