This is just a preview of the character tuning; the next update will have many bug fixes, including for things like not launching on certain Android devices, talisman effects not proccing on more than 1 enemy, and issues which caused characters to do no damage. We don't have the final patch notes for the update ready, which is why they're not posted (we're still working on the update, so it's not 100% clear what the full list of changes are yet).
Mummy Eddie already has a lot going for him with his skill set, so we aren't looking at changing that skill right now.
Even if it's a random ally, a guaranteed Accuracy Up buff to an ally would allow this character to do more than what we're intending him to do. Like Mummy Eddie, Angel of Pain already has a good usage rate and brings great value to a team, so we'd rather keep him as he is.