I read this on another thread and wanted to provide my personal thoughts on the matter as a GM.
To start with, I am 100% open to changes like this. If a character pushes hard, gets the support of other players, sticks to it and makes the right moves, I see no reason why PCs can't be the driving forces of real IC change. Modifying the status quo.
But this is not something that will happen overnight. It may never happen. It will not be easy. It could end up being something your PC drives for for months or years and never manages. Also, as a GM, I will be making the IC world react as make sense and often this will be them making a real effort to preserve their power base. And I will not force other PCs to support the change you want or ask them to not bar your efforts.
Sometimes I get the impression that people set on a path like this think that it's just going to happen in a few days or weeks. In 99% of cases this is just not reasonable. I have also seem cases where PCs expect to just have an idea and that the NPCs will magically love it and make it happen for them. Almost inevitably, I see PCs give up at the first signs of adversity.
Another aspect to consider (and this is something I am still trying to come to grips with and understand better) is that Sindome is a place that places a great deal of importance on the past. Removing elements introduced to the game by other players to make room for something new can be a touchy subject that needs careful consideration staff side.
On a personal level, I want new big names and cool, substantial IC changes driven by PCs. Please do try. Having a goal like this is a great way to ensure that you will always have something to do when you sign on. And I will be happy to support it to the best of my ability but do understand that 'supporting your efforts' does not mean it will happen and it really really doesn't mean it will be easy. That will be determined by how your PC plays it ICly.