If Statists are in power every four years you get to choose between two random rulers with monarch level stats. I'm constantly getting rulers with at least 3 in every stat and often 4-6 in two of them, only rarely ever getting two crappy monarchs in the same pick.
Then if that monarch is extremely good you can try to push Orangists into power to keep him in for life through random events.
Republican tradition isn't an issue since Statists give a +1 bonus and you don't ever spend it on reelections, so you get a ton of extra tradition to annex vassals with.
On top of all that you get royal marriages like a noble republic for easier diplomacy. I'd say the only disadvantage to Dutch Republic is that you can't become HRE.
Key thing is to try to stay near zero so you can switch between Statists and Orangists more easily.
Then if that monarch is extremely good you can try to push Orangists into power to keep him in for life through random events.
Republican tradition isn't an issue since Statists give a +1 bonus and you don't ever spend it on reelections, so you get a ton of extra tradition to annex vassals with.
On top of all that you get royal marriages like a noble republic for easier diplomacy. I'd say the only disadvantage to Dutch Republic is that you can't become HRE.
Key thing is to try to stay near zero so you can switch between Statists and Orangists more easily.