Transparency is good, however, I feel they are taking it too far. Take the latest QandA stream. I hate that they gave away details of all the rewards from the upcoming Fate of the Gods @ quest. I enjoy playing through the quests and finding out what I get at the end. There are some nice rewards from that quest on offer, but they have taken some of the anticipation out of it for me by telling me what I am getting from it.
Your other point about players giving feedback, in a perfect world, would normally be a good thing. However, I feel that the vocal minority as whole care about themselves only and not what is good for the majority or for the game as a whole. Proper discussions about important content should be encouraged, but we have seen time and again good ideas that may cause a few minor issues in the short term, such as items crashing, a little less gp coming in etc, but would be good overall for the long-term get screamed down.
It is my opinion that I pay Jagex to develop a game and content that will be enjoyed by the majority. I am not a game designer by trade, I do not have a degree in game design, so how am I going to know what is best for the majority of players. Yes, I have my opinions on what I like and want to see, but that will not always coincide with the majority. The developers have been employed because they are trained and know what they are doing. Feedback can certainly help them, but we seem to have a very toxic group that carry on about virtually every update that isn't specifically aimed at them, or will cause a marginal setback to their gp gains.
I think it is time for Jagex to take control of the reins a little more an start to develop the game they have done successfully for the past 15 years themselves again, instead of kowtowing to a subset of the player base again and again.