I have been using this for almost two weeks, and have not noticed anything negative - more things positive actually when it comes to accessing and adding modules from CPAN.
While I have three packaged - I would recommend this one:
http://dl.aixtools.net/perl5/aixtools.perl.5.20.0.0.I dated 12 August 2014.
This provided: ASIS : as it is for POWER4 and higher systems.
I'll look into compiling for older hardware - BUT - another issue is the version of AIX that it will work with: since I compiled it on AIX 5.3 - you need to be at least AIX 5.3 - and that already limits the hardware to CHRP related hardware (and I do not have any to test or compile on) - e.g., 43P-150.
So, if you really need it! Send a message. When I get back from my vacation (second honeymoon!!) I will do a build for you if you cannot - but it will still need to be at least AIX 5.3 TL7!