The more I read this post the more upset I become.
In short, what Obsidian says is "we won't do ANYTHING to promote mod support, we're simply leaving it there", with the most ridiculous excuse that exists: the engine is hard.
Just look at this post here: http://www.vg247.com/2015/02/24/pillars-of-eternity-mod-support-kind-of-hard-but-happening-anyway/
the Mandate (which appears to be an amazing game, of which I am a backer - I was too late for Eternity and ended up being only a pre-order and beta-tester) will feature full modding tools and solutions / middleware software should be available for things one cannot give direct access to.
Ways to promote mod support exist. If you don't want to, it's another matter.
I suppose I should be happy it's not ruled out by default...