I linked this in the Imperator thread because the interview was specifically about that game, but I thought Johan made some interesting comments regarding the development model for Paradox games that might indicate a change of thinking for other titles as well. Speaking specifically of Imperator, he says he would like to get away from expansions and only sell Content Packs for various countries and regions. He said he wants to avoid the EU4 situation, where if you tie new mechanics to an expansion pack, it makes it very difficult to iterate and expand on those mechanics in the future. So, put all the new mechanics in the free updates, leave only the extra content in the paid DLC.
He got on the subject when asked initially about what he would do with unlimited time and money so I don’t think he’s guaranteeing it will be that way, but it’s clear from the latest EU4 changes (making Development and Estates part of the base game for the purpose of expanding on them) that Paradox has identified it as an issue with their current development/business model.
Here’s the video. He starts talking about it around the 13:00 mark or so.