I have opened this thread because I think this has not been hammered out for us non-gods and the only other thread I saw on the topic was from 2006. Not to hate on 2006--It was a great year, I'm sure.
The questions are as follows:
In match up X, considering standard play, when is it appropriate to upgrade observer speed?
In match up X, considering standard play, when it is appropriate to upgrade observer sight range?
In match up X, what will delay or force you to prioritize either upgrade?
I don't think there are too many right answers so there are therefore many valid, wrong answers and I'd love to hear everything in between.
Will update OP if some one lays down the shit.