To get your half warrants you could sell those CUU shares that are in the TFSA.  Withdraw the cash from the TFSA, and you'll get a equivalent bump up in your contribution room in the new year.  Buy CUU from the PP for deposit to open account. 

You transfer the shares back (plus or minus depending on then SP) to the TFSA in Jan 2024.  Or sooner/immediately if you have enough ongoing unused contribution room.

Outside the TFSA your CUU shares are temporarily exposed to capital gains taxes for 4 months, but only if the SP goes up.   If the SP goes down, you won't be allowed to claim the loss, but you can cram back in even more shares to the TFSA than the number you withdrew, with in the end no net impact on your TFSA contribution room.