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We appreciate your thoughts on this @Thirsty13_CCW! What you are addressing here covers quite a few topics we've talked about in recent months but let me see if I can speak to the major points you bring up.
With the NTC, we announced this via the Development blog to solicit the type of feedback the community provided us. The purpose of this Blog is to let you guys know in advance what's being worked on and changes being considered for Testing. We took everyone's feedback into account and now this design is back for a rework. I would call this particular feature more atypical of what we tend to promote such as balance changes, new ships, new modes, new map, etc...
In terms of the GC, the goal was to provide balance to a ship that was performing a little better than it should. There were potential implications of other ships, but these efforts were around a single ship and we eventually saw this was not something the Community was interested in. With respect I don't think bringing the balance issue to the community would have changed the overall outcome as a number of you were actually ok with the balance changes.
We spend quite a bit of time communicating with our Community Contributors and a number of them were flown out to St Petersburg to see these changes and provide feedback to the team. Myself and other members of Wargaming also interact daily with members of the program. In the particular example you give, LittleWhiteMouse did not have as much time to review and digest the changes as some of the other CCs and we're going to do our best to ensure this doesn't happen again. There are instances where CCs do receive some information ahead of the public and their feedback is always welcome and a vital part of our process.
Communicating upcoming changes and taking feedback is part of our development process. We're committed to continuing this process and if a change doesn't work based on feedback or data from our testing, we make changes. For those of you who provide feedback (such as yourself), we're always going to appreciate it.