If it we're that easy to get there would be no point to doing other things like Coil. Even CT that's coming out in 2.1 is supposed to be ilvl80ish. The AF +1 is meant to supplement or fill in gaps in your current gear that you don't get from the RNG chests.

I agree though, only one viable end game dungeon to actually get said myth tomestones outside of Coil needs to be addressed. This seems more like throwing a bone to people that either can't spend the time to do the higher end content or aren't able to complete it.