Yeah I mean Sega's only official word was to deny that the game was outsourced, so....yeah. Assuming you believe that the whistleblower is telling the truth, that means that you also believe then that Sega essentially lied about the game not being outsourced.
So look, lol...either way, Sega doesn't come off looking great. Yeah Barry, I know, as a writer for a Sega site, why Colonial Marines likely is the way it is. (Or I have thoughts, anyway...based on the evidence we've seen and the whistleblowers' accounts. I don't think though that we should be taking unconfirmed info as fact.)
As far as Isolation's concerned....I think that Alien Isolation can avoid those major issues, sure. The game likely won't be outsourced, and development seems to be progressing nicely. That said, if there are issues with this game during its development, I no longer trust Sega to spot them and fix them. That's what Colonial Marines did as far as I'm concerned. It did impact my trust of Sega with regard to the quality of the games they're publishing. Colonial Marines is also just another game in a lonnnng list of licensed titles that Sega's put their name on that have been bad.
As far as the average gamer is concerned...how much of Colonial Marines' trouble they actually know (or don't know) is up for debate. If this game does turn out to be good, hopefully they trust Sega enough to give the series another shot.