I think many people share your concerns. I really thought Fusion was a mis-step and it was the first thing I thought of when I saw reverse tracks and magnetic sections mentioned for Pulse.

However, as you know, Colin reads these boards a lot and has posted the team's intentions and he seems very aware of Fusion elements that people didn't react well to. I don't think there will be much to worry about in that regard. The old classics are very dear to people (esp 2097 and WO3) and Fusion isn't. Pure was very well received. Though I obviously can't speak for them, I think the team is likely very aware of this and will be looking as much as possible to recapture what was great about the classics while moving on from Pure rather than looking to the one black sheep of the series.