There are, perhaps a dozen players on this Forum and another dozen on the US Forum (not to mention the other servers) that are contributing to the debate about how to fix the problems (real or not) in GBG. I find it amusing that this debate has raged on since the inception of GBG without reaching consensus. Meanwhile, the "silent majority", the vast number of players that simply "chew and swallow", go about their gameplay without complaint. No wonder that INNO has not engaged in this discussion. The silent majority pays the bills without complaint and, from what I've come to understand, most Forum members claim to be F2P. Of course INNO is not motivated to modify GBG - they have no reason to.
There's plenty of people who complain to the people who are involved in the discussion. And there's people who already *have* quit over it. This is not something that only bothers a few people.
There are indeed guilds that are just happy with the status quo - and they're also represented in the discussion by the likes of Yekk and Owl.
As for why Inno doesn't change anything, they've actually stated that before: because it's such a highly used feature they fear that any big change could hurt their bottom line. That while the status quo is less than ideal, they could make things even worse.
Ultimately if they do decide to make changes, it'll be on their game designers to decide what would improve the problem areas, not our specific suggestions - our weight into the decision process is solely expressions of being happy or unhappy with it; which likely takes a backseat to whether their statistics are favorable or not and if the statistics become unfavorable enough then they'll look to the written feedback for "why aren't people happy?" and construct their own solutions. Our suggestions are really only for our own entertainment purposes - they never would (nor should) treat us as junior game designers
For the time being those of us who are unhappy can try to find workarounds to find situations that are more appealing to us - hence for instance my observation of how top platinum groups have often turned into a race for the bottom to not go back to diamond. And why other than the 1 world I've mostly been avoiding being in a guild that would wind up in diamond (i neither enjoy farming nor being feed). The process of how these machinations create additional artificial pressure on the system might eventually be what leads to some sort of change as it spreads the discomfort to a wider selection of guilds.
When the system works best is when everyone feels it's in their interest to try their best. Before you have too many guilds sitting in diamond-1000 this holds true generally. When guilds start trying to metagame the system in different ways it becomes a wider problem.