I'm not sure this is a positive change on their part.
I'm not either, even if there are good reasons for the feature, changing defaults is icky icky icky :)
Actually, the more I think about it, the more I consider this a bug.
Actually I'm sure its a bug.
- It is not documented properly (not in Perl::Tidy).
- there are no tests for it.
- I just checked, and this has been the behaviour of Perl-Tidy since 05-Nov-2002. Changing the defaults after 8+ years is just dumb. jswartz was smart enough to add this feature, he should have been smart enough to change his perltidy config file :) and not mess with the defaults
You should definitely report this :)