simple suggestion - right now, dex warlock and charisma warlock are vastly stronger than melee warlock for a multitude of reasons - firstly being their ability to cast at range, but also chain's ability to deal AoE and doom's innate AoE capabilities. for a melee fighter, str warlock is insanely bad at dealing with groups, to the point it's comical.
therefore, a small buff i suggest. Greater Hideous Blow (not regular) now deals 30-50% (depending on balance) unavoidable blast damage to anybody in proximity to the target hit. it doesn't have to be very big, maybe the size of lesser eldritch doom or perhaps a bit smaller, but it would go a long way in bringing str lock's QoL up in pve. in pvp, good players barely stay still long enough that ur ever hitting someone with the new aoe component of greater blow