IF we bring in Tellas, who has great early crossing abilities, we would have a new offensive weapon in Cavani with him in the box. Otherwise, with Shaw and AWB, I thing Cavani will not be as effective without anyone putting in crosses, with our current "tactics" where we go with many short passes through the middle Martial/Greenwood/Rashford are all more suitable for our FWD position and we should still, even though time is ticking and it's almost impossible, go all in for someone like Sancho. Our wingers (Rashford and Greenwood atm) are more LFs and RFs then LWs and RWs, and so is Sancho. OGS said 2-3 days ago that Greenwood needs to work to score more goals with his head, but tbh we don't have any offensive player that is scoring or even searching for the position in the box to score with his head. Cavani would change that, and he is a free agent but Benfica said he wanted somewhere around 1.8m/week (that's why they didn't offer him a contract) so maybe 1+1 year contract and try to get down the wage and he could be worth a chance. He would definitely bring in something new to our offense.
Jovic on the other hand is big NO, the guy has totally lost all interest in football since he meet his new girlfriend (a Serbien model, that is also pregnant with his second child (from his ex girlfriend who he left (cheated) for the new one)).
He is traveling to Belgrad (Serbia) every day off to spend time with his friends and loves to party (even got arrested during the corona restrictions). He is unfortunately a typical Balkan (as am I) young guy that came from very poor family and now has more money then he can spend and is already satisfied with his life. My personal prediction is that he will fade out and probably retire early, OR realize that money don't last forever with his lifestyle in 3-4 years, go back to a middle club in Germany and have decent carrier. But he is not the man to lead or even take our offense one step forward with his current mindset.