Depending on when Tatum gets back, it's entirely possible his arrival would cause more disruption before they manage to integrate him, given his historical high usage and having to adapt to a lesser role. So I would be cautious in anointing him as our savior. It's tough for a guy coming back from a tough injury, trying to fit back into a team that has overachieved all season, and be treated as the Messiah who will take us to the Finals. Our team will ultimately be much better with him back in it but it depends on what version of him we get, and how quickly he can reintegrate. Unfortunately it's not as simple as reactivating him on NBA2K and he comes back with a 95 rating

If he a) comes back in time to reintegrate; b) is willing to accept a lesser role while he ramps back up; c) is healthy enough to banish any mental demons he might have about relying on his leg again, then he would definitely be a huge asset. Those are three big IFs.