Yes the defense systems needs to be improved. Perhaps a option where those with rang weapons shoot the attackers outside the hideout windows you just take and place yourself at the
window and when a attacker comes you shoot them. Depending on your skills and stats would very in damage dealt. Also while your at the window you wouldn't be able to be involved in a gang battle. Maybe if you kill a attacker then you would receive gang points likewise maybe a attacker could have a range weapon and attack you. thus making a gang war much more involved.