There's always a need for STH to contact the club and make sure that voices are heard. Sometimes it can produce really very sigificant outcomes. However, as people have said above, the stadium issue is a difficult topic. If you read the stadium thread (and given how long it is, I don't expect you to, but if you did) then you'll see that we've all been through this range of emotions before. Different people take it different ways, and there are still people on this forum who get very frustrated in the exact same way that you do - the only real difference is that we've learned that expressing thoughts about the stadium to the club won't help.
The issue is - and, again, those who have been here longest have gone through this already and so know the end result - is that CFG are very quiet about business matters when they're not ready to make an announcement. It's how Arabian business often is, so I understand - the announcement itself can be very impressive but they often like staying dead silent when decisions still need to be made, and it's been a feature of how CFG interact (or not) with all of their clubs. The thing people here have had to get their heads around is that a lack of announcements doesn't mean a lack of action, even though it often feels like it.
The other issue is that building a stadium in NYC is virtually impossible at the best of times, and the simple and honest truth is that CFG may have bitten off more than they can chew by setting up a team without a permanent home in NYC. However, they aren't the kind to give up and they aren't ever going to consider a stadium outside of NYC, so we all just have to accept that that things are moving, but they aren't going to happen any time soon.
So, to put it briefly - keep raising concerns to the club. It's a good thing. Just...don't mention the stadium, because the club knows all too well about that already.