As Steamtyme said, mostly time is what you will lose, but time is money and money/investments compound as time passes. Time is too costly to waste; as far as PayPal is concerned though, they are on the buyer's side, especially if multiple disputes arise simultaneously. There is no rush to file a dispute, and in fact PayPal would probably see a few extra days as generous on your behalf; this shows you were willing to give the "merchant" extra time to resolve any issues that may have arisen on their side.

If I had to guess, OP probably just wanted funds in their PayPal to attempt to withdraw ASAP so that it popped into their bank account. This way once thee disputes are settled, their PayPal will be negative, the buyer gets their funds back and OP has funds in their bank account. The outcome is that OP (assuming this is the case) will have more funds and the buyer will have less time. They even could've tried using their PayPal as a self-escrow to get the funds into another PayPal account, freezing/negative on the "escrow" account.