So far, what suggestion made by a player has actually been implemented?
there are a few actually, like bg times; bg format (the bg bands that we had prior to this maintenance was an intermediate step in response to complaints between the no bands bg we had before and this multi-band bg we have now post maint); dressing room so we can save looks we unlocked (Chinese version only got this a few weeks before we did indicating it was player driven!); holy seal was nerfed (they didn't remove it from the game as requested but acted following complaints to make it have less of an impact on the game); one click sell etc
There are others but these are some key changes which have come in response to player feedback.
Granted the changes aren't immediate. Creating these features takes time, especially when they don't already exist in other versions. Dev's are already busy fixing bugs, developing and testing new features (not to mention this is not the only game these devs provide or the only version of this game to look after); so it will take time for new features to be created, tested and then implemented.
You are more likely to get a feature adjusted somehow than removed completely. If people considered this and suggested how features can be changed while being kept rather than suggest removing them altogether, then they will often have a more positive reaction. Of course the devs will never say what suggestions they have will or won't adopt.
At the end of the day this game is based on the original Chinese version, and although the devs will make so local changes they will want to keep all versions as similar to each other as possible, so that essentially they are all the same game.