Thank you. I'm hoping to add the Ashcan alpha version of the game on here soon.
Definitely some things to add and consider, and some of what's already in the game covers things you'd like to see, so that means I'm hitting my mark.
So far, I've gone with your character having their own one mythic weapon that needs to be reforged (just like you, kinda), but included nods towards players swapping out weapons if they want. ATM the main foundation of your build comes from your choice of two godly Domains, one major one minor, rather than by weapon choice, but I do like that idea. But that brings us onto your second point.
Your choice of domains grant you 3 Powers (2 from the major domain, 1 from the minor). I don't want players to add more powers to choose from, because of reasons Spencer mentions in the SRD, so I've gone with the Upgrade approach. Each Power has two upgrades that increase what it can do. This gives that focus on a particular playstyles for that character (they only upgrade the things they've already chosen), but at the cost of it being quite random (although there are other rewards that can fill in for that I guess)
And lastly I love the idea of of challenge Chambers, and they aren't included yet. So I'm definitely going to add something in like that. I like the idea of them being something the players choose to do however so, just like in Hades with the challenge chests, perhaps I can add something like that.
Thank you for your input! I definitely feel like I'm somewhat on the right track with where I am so far from your response, but have other lines of design I can still follow.