Greetings.
While this is true that the major rewrite of the site's PHP code is
underway, this does not mean that redesign should wait until this
rewrite is finished.
In current 'portal' (next-generation postgresql.org) the HTML is
separated from PHP code, so if someone comes up with a brand-new design,
it can be applied in a matter of very little time.
Once again: if you are waiting for the rewrite to finish before starting
redesign, don't wait.