Interesting discussion, but I think it is useless here unless you guys make a serious post on LP.com to tell your opinion to the band. (cuz I don't think LP would go sightseeing here)
Also, for the LPU tour, I think they would go to the place that have MANY LPU-ers. Going to the place they didn't go before would make them make the show for at least 1 audience.
And for the old track, well, hardcore LP fans would love to hear these (so do I) but for the newbie...well.....just some of them could get over it (like Hahninator when they don't play what you like).
Beside that, not so many new LP fans (from New Divide or MTM) could hear stuff like M and HT (well, they could even not know anything about M and HT). Their heads is much softer than hardcore's, playing something too heavy make them like "WTF happened with this band? OMG, I lose my money for some disappointments?"