Way too late. The damage is irrevocable. He is only a marginal improvement on Noddy and that's being nice.
The rags need success, they absolutely depend on it for the financial benefit it brings, of course they do. With us, and maybe one or two others, we can enjoy it when it comes. It's nice: the kudos, the money, the bragging rights and all the rest of it. But we don't to need to be successful in order to survive, like the rags do. They have become the epitome of a plastic club: a here-today-gone-tomorrow fanbase of Far Eastern nomads living in an uncertain world of poverty and war. The rags can (and do) exploit this market with club shop tat and propaganda bullshit that these poor, thick and gullible people will swallow in bucket loads.
Ensuring they get CL is absolutely paramount for them. It is a minimum requirement if they are to continue to exploit the market. Singapore, Thailand, Myanmar etc, the people there couldn't give a fuck about Nottingham Forest, Brentford and the rest - no glamour. No Hollywood-style headlines about the club's every move, no glossy 10X8's of a star player, no constant updates when the reserves 'B' team is in training.
This is the market-led club the rags have created for themselves, a multi-billion pound tax-evading empire that used to be a football club.