Ieldra2 wrote...
(1) Leaving the Council to die has already backfired because it has proven unnecessary. Unless we see more consequences favoring the Renegade decision in ME3.
The renegade choice isn't to leave the council to die because it's necessary. It's to leave the council to die because they're jerks who aren't worth the sacrifice of human lives, and perhaps because you want human dominance. Your pay off is a human dominated galaxy, dead council members and more living Alliance soldiers.
"Concentrate on Sovereign" because you don't want to risk the galaxy choice is a neutral option.
(2) If the Rachni queen proves friendly as it appears, then killing her you will have committed genocide for nothing and you will have removed a valuable ally.
Maybe, but you've still removed a threat to human dominance in the future. Really, the Rachni shouldn't be all that important in the Reaper war either way, but in a few generations they'll be real threat.
(3) Killing Wrex has backfired because he wasn't a threat to the Virmire mission and his replacement is less friendly.
Killing Wrex isn't a renegade decision. You can save him with Intimidate and Charm both.
(4) I cannot imagine seeing anything good coming from killing he colonists on Feros.
Why would it? But the anti-thorian grenades you saved should have made killing those damn Thorian Creepers a bit easier.