sunset has always been a good map for g2, and I don't think tejo nerfs will affect them that much because their teamplay is THAT good.
In terms of map pool, I think G2 was buffed the most - their sunset was better than sen's last year, and they were pretty bad at fracture (well, they technically weren't bad at anything - no terrible losses, great map pool - but typically banned fracture).
Now, tejo nerfs will obviously affect them, and honestly I don't think Trent can really play that many non-recon initiators - I've seen him play fade, tejo, and sova, and that's basically it (a VERY tiny bit of skye). I'd be curious to see what he whips out now that tejo is basically nerfed beneath ground, since sova and fade aren't really that great on many maps (I say this as a guy who knows fade and kay/o lineups).
I'm not saying he's bad mechnically, but i don't know what he's gonna play now. RAZE???
So I think g2 is going to get slightly cooked. Expect PRX to be buffed.