I don’t know if “features” is the appropriate category to request Quick Reference Guides (QRGs) for all IF aircraft. Nevertheless I think that Mark Denton AKA Skyhawk Heavy has done an outstanding job with QRGs on the CRJ700, DC-10, 787, Dash 8 to name a few. I really appreciate the hard work and quality he’s put into his tutorials and can say that the QRGs he includes have helped me fly these aircraft in a proper and realistic manner.
I don’t expect this to happen overnight, but hope to eventually see QRGs for every aircraft we have over time. If it’s an aircraft series (ex: Boeing NG series which includes 737-700,800 etc) we don’t need a QRG for each model, just the base aircraft.