One small note. VituixCAD supports dash styles since 184.108.40.206 and high contrast for years. Aspect ratio was discussed earlier elsewhere: it stays e.g. 25 dB/dec as long as you don't change SPL span or frequency range outside Options window, or return how they were in Options (where size in px is calculated with aspect ratio, freq. range and SPL span). So there's no reason to import traces back to REW. It's just extra work.