Uriel's awakening is more on the broken good end of the spectrum (that is, on the opposite end of Ea's). It doesn't transform her in terms of function; she's a burst attacker with high combo rate in between bursts before awakening and she's still a burst attacker with high combo rate after awakening. But it sharpens her from being pretty good at that role into being really good at that role.

Details-wise...

Burst effect changes from bonus damage of +0.85 per charge to +2.00 per charge
Abi1 changes from 1 charge per use with a max of 5 charges to 2 charges per use with a max of 10. So you go from cranking up your burst by 0.85 with each use of abi1 to +4.00 per use. That's insanely good when as an awakened SSR, her burst multiplier should start at 5.5. She will ram into the soft damage cap for bursts very easily, which lead into...
Abi2 gets cooldown reduced from 4 turns to 3, as well as gaining another effect; raising her own burst attack's soft damage cap by 50% each time (to a max of +100%, so 2 uses). And she answers her own problem.
Abi3 gets burst gain rate improved from +5 to +7.5 as well as tacking on a +25% fire atk buff.
The passive is listed as improving from +15% double/+15% triple per charge to +20% double/+20% triple. So with 1 use of Abi1, you should rarely see single attacks, and with 2 uses you should never see singles.

So yea, awakening turns Uriel into an even Uriel-er Uriel. She becomes the Uriel-est.