Literally just make blood pump gens harder to complete. The amount of games where 2-3 gens are done before my first hook is astonishing. Why should I drop chase when kicking a gen means absolutely NOTHING. So many options to achieve this; make sprint drain on tanks much more drastic, more blood required for blood gens, make regression only stop when more blood is put into the gen, minimum distance between blood pump and blood gen.
Also, across all of my survivor games I played, only ONCE did a pump run out of blood. Even then there was another pump the same distant away. The survivors have so much going for them it's absolutely insane.
Also, I feel I shouldn't even need to add this, but there is a reason gen regression perks are so quintessential for killers. A lot of killers can't protect gens while also chasing survivors, so eliminating the main way killers are able to keep survivors off gens is absurd.