If you had your Solaris on txbit during the swap then you should of received the new Solaris coins. Yes KYC is now mandatory on txbit as due to European government regulations. I believe you can still trade however when it comes to time to withdraw you must do KYC.
It seems to me that the introduction of KYC contradicts the very concept of cryptocurrency as an alternative to the existing banking system.
No payment system can work without measures against money laundering and financing of terrorism. If you want cryptocurrency to be a true alternative to banks, you will have to accept that it will be a regulated environment. The wild west times are done for cryptocurrency. Welcome to the real world.
Would you rather cooperate in financing terrorism than undergo KYC?