A fork is the wrong path. Spam mitigation always occurs higher up than the protocol itself. You don't change SMTP to deal with email scams. All we do is carry on as before, placing sensible limits at the mempool level. They're still respected it's just there's a new avenue now exploiting the carelessness around taproot. Bocks aren't slightly larger - they should be around 1.5MB and they're just under 4MB. That's a failure.