Setting games to five balls will help with the points spread a little, especially if the goals are hard. You’ll have more players walking away with a 6 
Besides, five balls on DI don’t really make the goal easier to reach because uncollected SIM cards disappear at the end of each ball. So, the five balls give players two extra attempts, but they are just as unlikely to reach it on each ball because they cannot build progress.
Personally, I prefer pin golf with achievable goals and three balls. With five balls, the problem is that, in a match play final, a single bad hole with a 6 can put me so far behind that it is impossible to recover. If the worst score is a 4 instead, it hurts, but it’s still possible to make a comeback.
Never mix three-ball and five-ball machines in the same event, unless everyone plays exactly the same number of games and exactly the same machines. If some people play 5-ball machines while others can play 3-ball machines, scores are no longer comparable because of the two-point worst score difference.