Zag24:
I'm still trying to grok the new approach. (Admittedly, I've only skimmed it so far.) What I'm looking for is someone who knows both to tell me why it is better.
I've only glance at Spirit of the Century srd I found online, and most of my impression come from the veteran guide (p. 294 in Fate Core, or at
https://fate-srd.com/fate-core/veterans-guide in the online srd).
My impression is that they didn't change much about how the rule works (except for the four outcomes instead of a binary fail/pass). But, they do have changed the
dials (number of Aspects, number of skills) without really presenting them as that, dials, until the system toolkit (also available in the srd). In some of the
World of Fate Adventures, they changed the dials: characters with more aspects, not the same skill lists as Core.
Zag24:
It got rid of the skill pyramid, which I rather liked. [...] only to find that the basis for that work has been left behind.
The pyramid is there in character creation (but topping at +4 instead of +5). I think they didn't go with the pyramid for advancement because their default skill lists isn't big enough (only 18 skills, 10 are already on the character sheet after creation) for it.
If you keep Spirit of the Century skill lists, the pyramid would still fit in Core as it did in SotC.