Correct in my view. It should act as a deterrent to Jewell as any breach to the terms of his GL will be met by Tony Bloom’s top legal advisers, with Jewell on his own to defend his case. Chelsea won’t want to get involved so financially and reputationally Jewell could be ruined by a loose email, WhatsApp message, etc.I mean, it's not technically true that there's "absolutely nothing", though it might be "effectively nothing". An employee on gardening leave is still an employee; passing on privileged information to a competitor would come with the same professional (and possibly criminal?) sanctions that would occur if he did that while still actually working for Brighton.
Of course, it could be that those sanctions aren't strong enough to act as any kind of deterrent - I wouldn't know. If that's the case, though, that's when it becomes "effectively nothing".
Nine months is a long time to be tending your roses and a lot can happen (esp at Chelsea) in that time. No doubt Bloom has a price for reducing the GL period.
Don’t mess with TB who could be responsible, alone, for Chelsea breaching FFP rules and being deducted points!!!