DSOGaming reports on a gameplay & combat overhaul mod called Champion's Ashes. Be careful of using it through as it could get you banned.
Thanks Farflame!Again, its modding team has stated that Bandai Namco will ban you when using this mod. Therefore, you should make alternative Family Share Steam accounts. After you have set up another account, you can easily download and install the files onto your game, without fear of getting banned on your main account. You can find a guide for setting up a Family Share account here. Once Bandai Namco bans you, you can play online on the banned servers.
You can download Dark Souls 3 Champion's Ashes from here, and you can find below its main changes.