But open lists should give fairly equal representation, as long as the parties run a fairly equal share of candidates.
Which they often don't do:
Until Kurz rode in and promised gender equality in the ÖVP (which still has not happened after the 2017 federal election, but in the 2019 EU election => the ÖVP-delegation is now majority female), the ÖVP and other parties would simply rank a lot of males to the first 10 or so electable spots, despite a lot of qualified women wanting to run. Mostly it had to do with incumbent men not willing to give up their seats in parliament which they occupied for the past 20 years or so ...
It seems this is changing now with the Me too ! movement and another good step in the right direction was the new campaign finance law that was passed in parliament yesterday, which will already apply in the September election, and which will grant a public financing bonus to parties with a female share of MPs of 40%+ in their future parliament groups ...
(I still think that the FPÖ won't care about this bonus and will still not present a 50/50 list for the upcoming election ...
)