What no one has mentioned, and which you seem interested in, is the MV's complimentary tones to the LSS/LSC. No one has mentioned the Edge and Crunch tones on Ch.2, which are Marshall-esque. There is absolutely nothing in the Lonestar series that gets close to those tones. Big, thick, crunchy rock tones abound. Likewise, Channel 3 has Mark IIC+ and Mark IV modes, which have way more gain and way more "Boogie" vibe than the Lonestar series, and Extreme mode is just more on top of that. All of that puts you in classic and modern rock tones, metal, etc..... where the Lonestars just boldly don't go.
So, while people are talking about comping the Lonestar clean tones in Channel 1, you do get the Tweed mode there which is a different animal, 2 modes in Ch2 which are a different species, and all of Ch. 3 which is from a different life form. Plus, you get the GEQ and presets, the pentode/triode options, the choice of 6L6/EL34's.... In my opinion, which is worth less and less, every day, the MarkV adds gobs of new and different tones and vibes to your amp toolkit.
FWIW