They're definitely peculiar, but bear in mind that in a lot of places they're also standardizing a lot of other things, such as the 900 radius for auras and fewer abilities being undodgeable.
So peculiarity is moving to more... communicable places in the game design, I think you could say. Slark being perfectly invisible during his ult, Riki not being revealed at all outside of attacking post-level 6, and Blood Seeker seeing heroes in the FoW when they're below half health, these are peculiarities that are visible in a way those aura differences and the spell dodges weren't. I tend to like peculiarity in general, and these seem to be immediately graspable as opposed to the nuances they're replacing. So I think on balance the changes could be good, and I'm most definitely looking forward to playing around with them.