If we don't sign a striker, I think it's a sign of Jose's faith in Lukaku. Eden could work as the false 9. What he will do well is draw defenders out and open up space in behind to run at the defence but for me, it's the position of an unconventional striker dropping deep than an attacking midfielder going forward. I recall Eden Hazard playing as the false 9 for Belgium vs England. The problem he faced was that the defenders coped with him because he was outnumbered in attack. Belgium had lot of the ball in the final third but had nowhere to go with it. Space is everything in a false 9 system and In fairness, England sat back in numbers and cut down the spaces, so they had plenty of cover in defence but that's the problem Chelsea will face. A team which defends deep and in numbers can easily cope with Eden at the tip of the attack