I like the refueling
It give the teams more opportunity to visually influence the race for the positive when a better pitstop = jumped places, or negative when a failure = unexpected result.
Changing only tyres limits the time difference in stops to fractions of a second and reduces the chance of an exciting mistake.
In fact going back to changing tyres only is nearly pointless. May as well have a 20 lap race with no stops such is the reduced chance of pitstop excitement.
What I really don't want to see is 10 cars driving round at 3/4 speed because their tyres are in shreds and there's no fuel in the tank.