Pre-TS Hawkins was among the Top 5 highest Supernova bounties on Sabaody Archipelago (he was 3rd highest if I remember correctly) and was above both Law and Drake.
Bounties in OP are basically nonsensical hype tools. So really, based on his portrayal, Hawkins should not be amongst the weakest. He will likely be among the strongest.
Bonney in terms of power level is either going to be situationally overpowered or completely overpowered depending on how her devil fruit functions (i.e. touch based like Sugar’s devil fruit or ranged like Foxy’s devil fruit). She could end up being capable of one shotting anyone into pensioner or toddler age with her devil fruit.
Apart from her devil fruit, I am not expecting anything else decent from her. Lol.
The real weakest non-SH Supernova is Killer. That guy has absolutely nothing going for him. Shite on Hawkins all you want but at least he
has fans.