So I finally got all the money together to buy my full set of 9 heroes, and *then* I head over to multiplayer and discover that not only have I been missing out on all that loot, but now I've doubled up on three champion types
There is a prompt in the tutorial to check out MP and get your 'free' MP Starter Pack fairly early on in the game. I presume you didn't do that or you've been hard grinding gold and ignored it?
I too have a few issues with double characters and whatnot due to haphazard purchases and a couple misclicks. However, I think the real problem is not selling characters back (10 gold is a decently small price even at 1 gold per minute). The real problem is organizing them. I would like to have a better interface for handling the various characters (and possibly items and everything). I would like to have a clear and visible list of characters sorted by class and race as a sidebar. Instead of having to sort manually through the character sheets I'd like to have a list on the left and clicking on one of the character names would lead me to their page. Also I'd like a button to take everything off of the character without needing to manually move equipment. Control+Click should equip and unequip items to the currently selected character. Or something, I'm no graphic designer... However the current system kind of lacks in commodity. Also another minor thing: randomized starting names for the MP characters. Running into a Tineva-Coraline-Hurthin party for the tenth time gets old and can easily identify a new user...