One tells you the nearest node. One tells you the nearest highest level node. Those sound a bit obnoxious to always have on. I only used them when I was getting used to new nodes, or went back for something I forgot where it was exactly.
I do agree that Unearth 3 should replace 2. It's the same GP cost and it just improves the effect from just a flat 30% to a 30%+ and that could easily be changed into a trait skill upgrade. Right now you could literally have both on your hotbar at once, as well as the Truth skills being trains that are always on.
I don't think they'd ever change stealth. It's part of how things take just a little bit longer, which is an MMO nature.