Interfering with the past is bad.

Am I the only one who thinks that is short sighted. It has been proven (such as using a tb shot to save HG Wells who would died without it) that the team's meddling is important to the timeline even if it wasn't disrupted in the first place. It'd be interesting to see Gideon being able to predict what needs to be meddled with and not just where the latest timeline disruption.