I don't mind the nines - it's a once a year, pre-season thing.
We had the sevens in years gone by, which were a bit of fun.
In decades gone by we also had the midweek knockout Amco/KB/etc Cup, which was also a good alternatve to the main focus on the premiership.
Injuries happen, and modern players (and their clubs) squeal too much about how many games they play etc, given the money they earn (compared to the player sof the early 1980s, with pre-season, mid-week, rep games and 8 week kangaroo tours all while trying to hold down real jobs!).