Between 3/13 and 5/14 (the date the change was made), a cabal item was taken 651 times and retrieved 567 times.

Between 5/14 and today, those numbers are 721 and 689.

The average number of players online for those two periods of time is consistent +/- 1, so I didn't bother adjusting for that.

I'm not ready to draw any conclusions but regardless of why or whether it's even statistically significant (it probably isn't), there has been more cabal wars activity in the 62 days after the change than the 62 days prior.