I would argue that Orion's main claim to fame, so to speak, is that he is the lynchpin of the group. If he had not started playing Eternum only Dalia and Annie would maybe play occasionally together. Luna & Nova (as Delilah Warren (with Dione) would be solo players and Penny & Nancy would not be in the game at all. Not to mention Calypso would still be stuck in a box.
Orion brought all of them together to make a strong "TEAM". He does not need to tell the girls to stand back and let me be Mr. Macho and save the day.
As far as Nancy goes, part of her success was luck and timing. The original Emperor was a dick, and Nancy has charisma in spades. She leads like a true leader, so people follow, and the legends grow.
Annie is far from useless, as she said, they kept going to ""Magic Blocked" servers, so that takes her out of the game on those servers but ON magic servers she is at the top of her game if not the whole game with Solar Cataclysm.
Penny through conversations has mentioned her growth in healing spells. True, we have not yet seen what that growth is but considering the group (and the mysterious growth people in Kredon seem to be experiencing) she is probably going to be mastering some nice abilities.
Alex, well... she is or can take on the form of a fucking Dragon, come on.
Luna has amazing summons that are beyond compare and spells to back that up.
Nova has Dione which can become any ranged weapon she can imagine.
So WHY does Orion need to go all Alpha, ever? A good boss knows when to use his/her people and when to step in. I would argue that he is understands his limitations and abilities, and while he gets cocky at times the girls help to keep him grounded. This does not make him useless or a failure.
Anyhow, ramble off...
The short of it is, it's a fantasy "GAME". There is not one game on here that 100% abides by realistic standards so not sure why people's panties get in a bunch by the slightest liberties taken by dev's to enhance the story. Just accept the Lore and the possibility that it's all in an alternate reality and move on.