Jack the Ripper is a very atmospheric DLC for AC Syndicate. Unfortunately, the atmosphere is spoiled by Evie's ridiculous outfit and how much she has aged. This mod aims to fix that.
The hood and all gadgets work properly.

To install the mod you will need by Kamzik123 (https://www.nexusmods.com/assassinscreedunity/mods/38). There is an instructions how to merge data files by Aetiüs (https://github.com/Kamzik123/AnvilToolkit-Resources/wiki/Merging-Data-Files). 

Open dlc_21 in your game's folder. Use AnvilToolkit to open each .forge file with the same name as in the mod. Put .data file from the mod into your .forge file. Repack. Do it for each file.

For example: 
1. Open AnvilToolkit. Click on AC Syndicate icon.
2. Open there dlc_21 folder.
3. Open there DataPC_21_dlc.forge.
4. Click right mouse button, choose Open containing folder.
5. Now open mod's folder. Open DataPC_21_dlc.forge and copy 1104_-_ACVI_DLC_CHR_P_EvieFrye.data.
6. Paste 1104_-_ACVI_DLC_CHR_P_EvieFrye.data into opened game folder DataPC_21_dlc.forge and replace.
7. In AnvilToolkit click UP button. Now you are in dlc_21\Extracted. Click the right button on DataPC_21_dlc.forge and choose Repack.

Done.
Repeat it with:
DataPC_ACVI_DLC_Asylum.forge
DataPC_ACVI_DLC_Manor.forge
DataPC_ACVI_DLC_Prison.forge
DataPC_ACVI_London_21_dlc.forge
DataPC_WhiteRoom_21_dlc.forge

Known issue - grey face on title screen. But in game, in all cutscenes face is Ok and everything works properly.