History shows that the earlier the better. Players get a full pre-season and time to bond with the squad and improve team chemistry.
Younger players in particular benefit from having that stability early on.
The later you leave it, the more the upper hand goes from the buyer to the seller
Not at all. Lloris is a great example of the opposite happening. We bid early they wanted more, we walked away, they came back saying they'd accept the offer and Levy stuck the boot in changing the conditions to be even more favourable to us. Every situation is different and a money club coming in and trumping you is always a risk as are many other factors in a long negotiation. So obviously it's preferable to get in early but when you're trying to catch up on teams who have greater resources than you, you have to maximise them and that means being patient and gambling on missing out on players rather than overpaying.