Honestly, innovative is not a permanent must for anything.
You can easily enact the decisions and westernize and then go back to narrowminded (i do it a lot), ends up much better in the end.
Likewise, narrowminded also has some...decisions...that give more missionaries and such, that can be very useful.
Oh, Liquor act is another good decision, i'm not feeling like taking a look for other decisions, but whatever.
The point is, if you want x decision, you can easily move your sliders and then go back to your old slider positions.
Infantry cost? No thanks, i'd rather have better morale and more advanced tech than lots of cheap infantry that won't win big wars.
Well actualy you are wrong about one thing. Number might not win a battle. But lot of cheap troops are giving you possibility to easier go over certain number of troops. And when you got more troops, you can much easier fight on more fronts. Aslo, when you lose cheap troops you won't need to care so much about armies, as you will just rebuild them. This just change the wars. Not mean you will lose them. Aslo if you got more manpower, you can fight wars longer. And it might mean, that you might win war just by pure manpower thing. Well it just depend on your playstyle - not like any strategy is worse than other. But cheap troops are good for big countries, that play atrition wars - as if you play atrition wars, your troops are wall, for the enemy, to stop him, not realy to kill him. You want in such war to use the troops, to prevent enemy from assaulting your fortresses, and if he attack your troops, lure him deep into your territory, and kill him off by that, then destroying him. If you got lot of manpower, and cheap troops, loosing some armies will not be a problem, as you will not get so much WE as your enemy, and you will be able to easily rebuild it.
But as you need troops to be cheap, infantry needs to be cheap too, so it just mean you need to go serfdom. If you will go free subjects, you will have much more expensive infantry. This strategy is not good for all countries - aspecialy not for small ones. But if as a big country you go quality, you will gain much more WE from battles when you lost any men than if you got quantity. Also, if you are free subjects, it will be much more expensive, to build the army back. So with those two combined you will have problems if any rebelions occur, as you OR will have much less troops, or you will have much more expensive army - which will mean you invest less into economy. So if you mint anything, you will get less money, so you will get less buildings, so you will be lack in economy, so you will lack in tech. And if you will have smaller army, you will have to face the fact, that western nations, will just kill you easily, even if you will have same quality as them, as they will anyway outtech you - no matter if you westernize - the tech gap may only stop being so big, but during westernization, you will get much slower tech due to stability. And thou, if you don't westernize your troops - you will lose anyway. If you will westernize your troops, you will still have a big gap, caused by stab loss. So, if you will go quality as westernizing nation it don't mean you win, and if you will go free subjects, it will mean you are dead, cause your stabcost is high as hell. And if you even go back to narrowminded, it will not change the fact, you got lost much to invest in tech, that you would not lose, if you would be serfdom. Also, remember that you need a tech gap to be high enough, if you want to westernize. So you got serfdom for this.
For western nation, which got lot of incredably rich provinces, going serfdom is not needed, as they don't have so big territory, but it does not mean they can't - it might work, still it just depend on how you exploit the fact. For example - going serfdom migh be good for land France. If he is going to have mostly infantry armies, it will decrease army cost by a huge amount, letting him to invest the money in building, and not mint, which mean he can invest more in tech. As he don't colo nize, and he don't realy need misionaries (he might be tolerant type of france), he would not get much from going narrowminded. Also, narrowminded give him ability to entact +1 tolerance decision. Well it is quite nice.
About missionaries decisions - they are nice if you need them, but what if you don't? they don't give anything good, only decrease some thing (there is one good, but it needs you to be centralized, not narrowminded). So it is not like that narrowminded decisions mean you gain something except missionaries.
Also liquor act? RLY??? This is not quite the best decison. Increase tax by 3%... and stability cost by 4%. Not best choice if you got problem with stabcost, and not realy great income gain.