Golden Century is as it is. There isn't really a possibility of changing it now. I think we should just accept, that it isn't a satisfying product and either suggest small changes, that still could be implemented without changing anything in the implemented features or let it be like it is. GC won't be made good and there just isn't a point to suggesting any new features or complete new approaches to the ones already suggested.
And while the community should just kinda forget about the whole thing, the Devs should not. Voting with wallet on one Immersion Pack by basically only the users of forum isn't that big of a deal, but the problem is in lost trust. People will forgive flaws in products by a game producer they like, but if trust is lost (and it was), then we can expect a lot of complains for future content (just look at how many disagrees
any post by the devs has). The next expansion just has to be a satisfying product and for that it has to be
well thought and well executed.
A bunch of disconnected uninteresting features, which each seem to take half an hour to code in are just not the thing we want to see. I can speak for myself and if the future product will have good planning and ideas behind it and there will be no going the easy way to add them in (So there will be a significant effort to translate the good idea into a good mechanic, without reducing it into something uninteresting), then the next thread I'll create will be of praise. After all this thread is mine and it just comments on added features (I also did one for Dharma back when it came out). Causing hype is definitely not my intention, but if there won't be much to honestly complain about, then the thread will surely discourage dismissing the expansion, in opposition to "It's your choice, but don't" kind of gist.
It's unfortunate the expansion isn't meeting expectations, but it's necessary to look at it as an example of what not to do, because the loss of customers' trust can only snowball and anti-hype certainly isn't good for anyone.
It's also necessary to look closer at the idea of Immersion Pack. I would argue they are not needed and are a pretty bad idea, but it is just my opinion. What isn't subjective, is that there needs to be a definition for one, if they are going to still be created. If an ImmP is loosely defined, then objective judging of it isn't really possible. With a clear points made of what it's purpose is, what makes it differ from a DLC, what makes a DLC differ from it, how should it change gameplay (for everyone, just for everyone interacting with the region or maybe just for countries in said region). All ImmPacks had their flaws and luckily in different ways; by looking at what the complaints for each of them was, there is an opportunity to better plan next ones.
To sum up, I hope there will be more attention put into next expansion, but also that the community will calm down and won't dismiss next DLC without giving it a chance.