IMO the scale doesn't change anything once we get used to it. It's like pricing everything in cents instead of dollars. Soon enough you'd get used to paying 150 cents for a coke instead of USD 1.5. If anything it makes things more detailed. Because there's no decimals in the trust ratings before 0.2 and 0.4 were both shown as 0. Now 2 and 4 are shown differently.
The important part is that everything gets reflected to the new scale, for example light green and dark green (which was already changed by theymos). And we must get used to the new scale.
I disagree since we have a scammer issue here. I think earning even 1 green trust should be a real hassle. It should be rare to see people with green trust around here with all the scams and B.S. Take my score for example on default trust... +196 that to me is just silly. Maybe on a scale of 1-25 I should be a +5 or even lower.
Now the trust is shown as green only when it's at least 5, not 1 as before, so that will help. But I see your point, probably scaling/rounding down would be helpful, especially for the first point(s). Maybe it would make sense to further increase the thresholds for light and dark green.
Also people shouldn't give positive (and negative) trust so easily, especially those on the default trust. For example I really don't think
alcaz deserves a trusted positive trust just for sending first $4.40, even if that didn't make his trust green.