Hi, all! New member, glad to meet you all!
Keep in mind my understanding of the Cosmere is restricted to the three novels and one short story I've read, plus plundering the Coppermind, so please excuse me if I make an error in reasoning, but...
Shards and those who hold them are basically gods, yes? This doesn't mean they all have the same powers. Each Shardworld has a very different Investiture, yes? (Yes, I know it all comes from the same ultimate source---Adonalsium!---but each Investiture manifests in very different ways.) Therefore, wouldn't the abilities personally possessed by each Shard therefore also be very different from every other Shard?
Take the Greek gods, for instance. Ares couldn't help you in matters of love, just like Aphrodite couldn't do anything for you in martial matters. Therefore, Odium might be considerably more directly destructive than other Shards. Maybe Harmony is, not less powerful, but less able to overtly manifest the way Odium can? What with Intent shaping each Shard/Investiture?
Or am I completely wrong? I apologize if this has already been solved, elsewhere.