I usually sell my worst player to sign the free one and I usually would buy the replacement for this worst player first. Kill two birds with one stone. If I tank the season, I might think of signing the 24T one, but only if l cant find a comparable on the transfer market. I did recently for 1 token, got a 4* backup GK that was actually better than the 24T GK 4*, but cost me $23M and one token instead of NOTHING and 24T. So it all depends on your needs and situation.