A few things I don't like about Season 5
1. Living in Etta's apartment. Just seems unsafe. You would think the supreme intelligent observers would think to post someone near the apartment to watch it or at MINIMUM search for evidence.
2. Yelling and playing loud music at Harvard. The place is a base of operations for the observers yet they don't even remotely attempt to be quiet while going about there business.
I won't nitpick with the time element because that would bring the wrath of Fear down on me but there are always plot flaws inherent with time travel.