Ok maths time.
Human.
Standard starting XP, +10 because.
All 2's option:
We get 8 ranks in skills for free, and none can be above a PP roll. Let's assume we are lucky and 2 of them can be made PP for free, that makes 2 PP skills, 4 AP skills, and 27-28 skills at AA.
But we have 120xp for talents and skills. The cheapest Dedication is 75, including 4 cool talents along the way. So there that goes since a flush of 2's is unremarkable. Leaving 45 for some more skill ranks and other talents. That dedication can at best raise 11 skills to a 3 dice pool (Intelect in AoR), worst case scenario is Brawn with 4 Skills (and a WT and Soak).
Now let's somehow go best case scenario, 35xp to raise 2 skills from 1 to 2, 1 skill from 0 to 2 and 10xp left for fun. With a knowledge focused junky we have these skills 5 APP, 6 AAA, 2 AP(human out of career skills) and 21 AA...
That to me is a little underwhelming and very limited even if those 4 talents we got are cool.
Let's now analyse the 2,3,4,2,2,2 build.
Using the same hypothetical career, we spend 100xp on our characteristics, leaving us with 20xp and:
2 AAPP skills, 2 AAAP skills, 7 AAAA, possibly 4 AAP, 3 AAA, and 16 at AA. Then 20xp for talents gives us 2 tier 1 and a tier 2.
The difference gets even more extreme if you introduce other species, where 4,3,3,2,2,1 is doable. So I just don't get the idea that XP on Skills is better than XP on Characteristics.