Why not just play the alts? What else don't you have done on your main? And what doesn't work with fellowship sharing? I hear people use it all the time.
Absolute nonsense. Where are you getting this? Do you even play on a Live server? You're certainly not getting this from your TLP, because no TLPs have reached ToV yet. The truth is, whole bunches of players dinged 115 on Live before Overseer was even launched. Yes, the XP rate is a bit more of a grind than prior expansions, as has already been discussed at length in this forum, but there are plenty of ways to get it. Solo progression is always going to be a challenge in current content. That's how EQ works.