I think this means the end of Rafa to be honest. 2 years left on his contract, so we can either get a decent fee for him now rather than lose him for free in 2 years time. Actually keeping him for another 2 years and letting him go may be not the worst thing, since he would hit his 30s and not command a massive fee anyway, but his performances would decline and injuries would stack up.
This is us getting Siggy in to replace Rafa, with Siggy's best years ahead of him, and we'll probably be able to turn a profit on the dealing too. Siggy replaces the goals from midfield, and also fits into a 4-3-3 that are likely to play. If it's AVB, Rafa doesn't really have the pace to play in the front 3, and doesn't suit the midfield.
Gonna be an interesting summer for the new man. The club will likely be letting Rafa and Modric go. Good replacements will be needed. I think Siggy and Sahin would be great business actually, and the Modric money would allow us to strengthen other areas too.