Game is amazing so I would try it out, steam has that 2 hour refund thing so if it runs bad with patch then shelve it. Even the PS4 version has issues with the latest EU/NA patch (and latest JP patch has some minor issues) so I would try it out and see how it goes.
If it runs well you'll have a good time for sure.
DLC also adds hair dyes for 2B/A2, Emil/CEO bullets, a few masks and obviously the DLC outfits. But there's also fruit you can use to lower your level by 10, but you can only get it for beating the absolute hardest arena. Full of 130 enemies that 1 shot you on easy unless you have the absolute best chipset (and even then ranged attacks still 1 shot).