User blog comment:Legionwrex/Why Destroy is the worst ending (besides refusal)./@comment-1388547-20120707004302/@comment-1388547-20120707053913

My issue with Control is not that I think Shepard will be corrupted by having so much power, but that his/her loss of humanity could lead to harming organic life unintentionally, simply by no longer being able to understand or empathize with it.

As for the quarian-geth peace, my impression was that the geth were always willing to make peace -- at least, that's how Legion presents matters. (Though I gather the alternate geth VI behaves differently? Legion has been alive and loyal in all my playthroughs.)  The Reaper upgrades were a separate issue, and were relevant to peace only inasmuch as they gave the geth military strength to match the quarians' and keep themselves from getting curb stomped at the end of Priority: Rannoch.