It's not about Paradox making DLCs. I'm glad that they add new content. The issue is that Paradox rarely releases a patch that fixes bugs. The only time we get bug fixes is when a new DLC gets releases and that's not a customer friendly policy. We have to deal with countless of bugs in EU IV and have been told that many have long been fixed in some mysterious dev version. In my opinion Paradox should release a bug fix patch at least once a month. That's not too much to ask for.
http://www.eu4wiki.com/Patches
Maybe we have different definitions of rarely. We could absolutely patch more - but this is a balanced approach - patches and new content features. I don't think it's too much ask for regular patches - but expecting/demanding or saying we do it "rarely" I think borderlines on entitlement.
The process of patching games is very time consuming and thus costly. Some bugs can take 5 minutes to fix - others 5 days. Additionally each patch carries with it a certain amount of overhead. Writing patch notes, coordinating across the company, planning and doing QA etc etc (the whole magical act of publishing). The more frequent patching the less substantial they will be. By releasing major patches with major DLC reduces some of that overhead and allows us to give you more free stuff and fixes.
Listen - give us a bit of credit - we're not douchebags - we play our games ourselves (and experience bugs first hand) and really try to do the best we can - but there are a lot of limitations - many of which you don't see from the outside. The development teams supporting the games are miniscule.
We always strive to be better - being grateful and supportive of what we do motivates us even more than saying we don't patch stuff enough when our patch rate is among the absolute best in the industry for strategy games of this caliber. And I'm not saying "don't be negative or you won't get anything" - but being more constructive helps me at least in these kind of discussions.
Lastly - regarding bugs QA (having started my career in QA I have a bit of insight); bug triage (prioritization) is a very delicate balancing act. Bug severity x bug occurrence rate x impact on other features = bug priority - it's not an exact science but that's roughly how it works.
There might be a big that's very, very annoying and severe for you - but if the player base as a large doesn't suffer from it it's probably not going to get the highest priority. As a great ancestor of mine once said - the need of the many outweigh the need of the few, or the one.
and again - yes we can do better - we always strive to.
/shams