I think refueling is a trade-off. On one hand, it makes race strategy more interesting, since it opens up far for pit stop options. We'll also see a wider gap in car speeds leading to more overtaking, based on who has a full fuel load or not.
On the other hand, we'll lose those blisteringly fast 2-second stops, and most of the overtaking could happen in the pits, rather than on the track.
Probably just have to see how it goes. I'm mostly a fan of endurance racing (the WEC, Le Mans, etc) where pit stops and fuel strategy are just as important as having a fast car. I think it makes the races much more interesting, since you have to consider how all the different strategies line up by races' end.
"Never argue with stupid people. They will drag you down to their level and then beat you with experience."
-Samuel Clemens
