I think there needs to be a decision over whether this is to be a government sim or an election sim, and, if it's the case that it's a government sim there absolutely has to be balance in the parliament. A major problem with atlasia was the fact that atlas leans left so election were too easy and the senate too warped to have real debates. For a centre leftist there was nothing to do and for a right winger there was no point even trying. So if it's going to be a government sim I think quotas for different political views need to be considered. Elections would be needed to shake things up but there should always be a solid block of both wings to make things challenging.
What about an election sim with an election moderator rather than player voters?