Well you lured me in with the flattery 
I think he only helps, he's their best forward and while Cameron loves left field moves Greene at FF has been by far his most reluctant change to make, I personally think it's stupid as he's by far their best 2 way running midfielder that isn't a pea-hearted astronaut named Whitfield and his disposal has improved markedly since he was younger.
Realistically though he's playing FF, perhaps the biggest negative may actually be to Preuss as having Greene at FF would definitely allow them to drop the Keeffe/Riccardi 3rd tall/2nd ruck type and play a genuine 2nd ruck in Flynn/Preuss, which would give them midfield dominance which as I write this knowing that's the thing Cameron hates more than anything makes me doubt it but...
Releases Coniglio/Taranto more from a bit of forward work they're doing but I expect those two still go through HF for large parts of the game, neither has been filling Greene's role. Kelly will still be playing his "avoid winning the midfield" role on the wing with stints on the ball that will, shockingly, coincide with the Giants winning clearances and going forward and then dissipate when he moves back outside to spaceman roles he's not actually well suited to.
Green probably also gets the release from up forward a bit more but I think his engine is still the primary reason for his forward time so not expecting a huge change there. As long as Greene, Kelly and Hopper (inj) are not playing proper midfield roles then Green remains their only genuine extractor who gives the ball to Giants players, Taranto is better suited to the defensive sweeper role he has primarily played this year when midfield, still as a ball winner but not the primary target.
Basically I think it's beneficial for most, probably not the rucks if they go 2 rucks like they should, as Greene will be marooned up forward which means the others shouldn't be.
SC wise, having a genuinely good leading forward target who actually runs to the right spots it should be very beneficial to Whitfield, Kelly and Coniglio as the primary kickers but also anyone else kicking. Also beneficial to Hogan who also does that. They'll both still have Himmelberg running around like a chicken with it's head cut off going to the wrong spots and dragging his defender to the contest but he's got pictures of Cameron doing bad things and seemingly can't be dropped despite being not very good so that's inevitable unfortunately.
