An unfitted hull isn’t necessarily worth much by itself because it is already mostly covered by insurance payouts, and we can’t pay out more in total than is destroyed. So most of the value will come from destroyed modules (or from destroyed implants for pod kills).
A rough estimate would be around 1 LP for every 3000 ISK worth of destroyed stuff (but that also depends on what that destroyed stuff is and where it comes from)
Generally, if you’re at tier 2 now, you’ll get about 3x more LP for FW kills with this change compared to TQ today.