Open the example scene and look at the labels. It's probably the one called "Tiles"

What do you mean? Yes, you can open the included PBR shader, which will use the Unity 5 PBR

That guide doesn't really apply anymore, since Unity 5 has built-in IBL. To use that, look at the included PBR example shader to see how to set it up :)

I believe this isn't an issue anymore in Unity 5, though you may not be able to check

Does this happen in 5.0 as well?

That's definitely possible - though you should ask this in the forums rather than here :)
All the info you need to make a shader like that is available on the Wiki - check out the UV section!

Sheen? Could you elaborate/show screenshots of what you mean? :)

Hey!
You'll need to do blending the way you did before, but modulate the t-values in the lerps based on heightmaps.
This isn't really a question for UserEcho though, and you did get a few answers in the forums :)

The Unity 5 beta isn't supported - the minimum version is 5.0.0f4

It's tricky at the moment, but, like you said, this is more of a forum question :)
I should really add a system for proper particle shaders though.