I disagree. I like the mono much better than the stereo.
DSA Dynamic Sounds Assoc. played Beatles mono at 2014 RMAF, most or all tube gear, $2k mono cart, TAD CRM1 speakers. Probably the best reproduced sound I ever heard. Reminds me of direct mic feed Tower of Power at Sausalito Record Plant. I can not list enough superlatives, absolutely mind boggling performance, dynamics like I never heard before, etc, etc...also indeed would not say flat like you might suspect is mono. It was more like raising the dead with George and John in the room playing and singing for us. Honestly never heard anything so realistic ever, and I've heard IRS III set up well in dedicated listening room with DAT source. It's worth it to fly as far as needed to hear this demo again, or one like it. I was shocked at the performance level, and believe me, was not expecting it to be that good.
David Skolnick (sp?) of DSA told me himself that Beatles mono was cut with a stereo head, and believe it or not they plan future release cut with a mono head, which shall be even higher performance.