I find this a bit strange. As far as I can tell, every attribute roll still has ranges, except for the skill tier roll. It can only roll +1, unless I'm wrong?

Basically to get maximum skill damage, you have to have all 6 gear pieces with +1 skill tier roll.

If this is correct, not only does 6 piece "yellow" sets guarantee maximum damage, but it also means you can't make unique skill builds because you'd be required to have all 6 yellow pieces. It would be much more interesting if for example, chests and backpacks could roll +2.

Hopefully I'm wrong, and in fact at least a few pieces can roll more than +1. Can anyone verify this?

Edit: Alternatively, we could just keep skillpower, and gain 1 skill tier for every 500 skillpower. 3K would be 6. And skill mods could still work like weapon mods by scaling off your skillpower rather than having static effects.