Okay! After spending some time thinking about this, I've decided to actually try and come up with an idea for Westernization that would please, while not everyone, possibly more people than the current model does now. Firstly, allow me to state that I do not believe Westernization should be player-only. In my opinion, this simply gives ROTW players an even bigger advantage over the AI around them than they already have, as they can Westernize and then kick around their neighbors with impunity. I believe that Westernization should be costly, but worth the cost, and I don't believe just any nation should be able to Westernize. I also believe that Westernization should have a viable alternative, but alas, I wasn't able to think of one. Perhaps someone else can help think of an alternative. But for now, here's my idea. Actually going serious mode here. I propose the following changes.
1. In addition to the current rule of being 7 technologies behind a Western neighbor nation (or owning the cores of said nation, or said nation owning your cores), I believe that Westernization should require opening and fully completing one of the following idea groups: Administrative, Innovative, Humanist. I chose these idea groups because to me, they give the feeling that your nation is gearing up to be ready to Westernize. I'm not fully happy with the choices of Administrative or Humanist, but I want the player to have options aside from just Innovative, and those two seem the best choices.
2. I believe that an additional tech group should be created: Westernized. It would have one key difference with the Western tech group: in order to Westernize off a Westernized tech nation, as opposed to a Western tech nation, a nation must be 11 techs behind the Westernized nation, rather than seven. I feel this will help slow the flow of "chain-westernizing" without eliminating it entirely, which makes little sense from a realistic perspective.
I would create a mod to emulate these changes, that I may test them out and see their effects on gameplay, but sadly I have no skill or experience in modding, and I'm not even sure if these changes could be implemented in a mod. Thus, I am hesitant to say that I'm confident these changes would improve the flow of the game, but at the very least, I'd love to test it out if anyone would be willing to give me a hand with the modding.