Kucoin is a great exchange and it's listing coin almost everyday hope soon xem will be lsited on kucoin too.
I think most coins did pay quite a lot to get listed there, so it might take some time since NEM is normally not paying horrendous amounts. But besides, it is listed on every other reputable exchange and more and more are joining every day. I don't really see the need of another exchange to be honest.
How many coins do you need to hold the node now? is there a master node? do you plan to reduce the number of coins required for the node?
You will find ever information at nem.io about nodes. There are super nodes requiring a huge amount of coins. Mostly people aim for 10.000 XEM to be able to start delegated harvesting
The listings on the exchanges are very worthless, and the listing for binance is the most expensive, we do not now know how many NEM were paid for listing, I hope that NEM got it either for free or for a small price