Because this is singleplayer and no one has to bother if anyone wants to try out a maximized NG+ char.
It took me almost 80 hours to accomplish such a char. I had formerly another slot of a ghostly and clean hands playthrough with Corvo, as additional experience for my NG+ playthroughs.
I started a completely fresh slot with Emily, as NG+ wasn't a thing at this time.
However, during my playthrough it got released and I was thinking about creating such a savegame right at the start. Therefore here it is.

To make this savegame work with your game, you need to deactivate the Steam Cloud, by goin' to your Steam library and right-clicking onto Dishonored 2.
Choose "Properties" to open up the menu like presented here.
In the section "Updates" be sure to deactivate the checkbox for the Steam Cloud savegame management.







Now you need to open up the savegame directory of Dishonored 2:
Be sure to make a backup of YOUR OWN SAVEGAMES INCLUDING YOUR "Profile.bin and put that backup somewhere save, so you're always able to restore your own files.
Now put my files there instead and boot up the game.
You should now be able to choose a NG+ from my savegame in slot 1, where I just finished my High Chaos run with Corvo.

Click here to get the save from my Dropbox

[www.dropbox.com]

The savegame has following features:

• 172 runes (170 + the 2 from the shrine in the void) at start
  
• 56 bone charm effects unlocked and ready to get crafted into a self-made bone charm
  
• all upgrade blueprints are found, can be bought at Black Markets.

...to Bethesda for publishing and Arkane Studios for developing this game.
I always wanted to see a sequel to DH1.
Hopefully you keep up the good work with some nice DLCs...

Even if many people got performance issues, I was one lucky enough who had just minor issues with some crashes here and there.
Problems which can be counted with one hand.
So it runs great for me and NG+ brought the replayability to a whole new level.