There are a couple of issues causing hair to clip into hats with the addon version, they’re fairly easily fixable but I’ll send the OP updated versions of the files needing changed.
One line needs to be changed in each of the male and female .meta files. This will fix the loading of creatureMetaData, without it the game won’t read the ExpressionMods property within .ymt files.
‘mp_m_freemode_01_mp_m_emergency.meta’:
Change line 7 to: <creatureMetaData>MP_CreatureMetadata_mp_m_emergency</creatureMetaData>
‘mp_m_freemode_01_mp_f_emergency.meta’:
Change line 7 to: <creatureMetaData>MP_CreatureMetadata_mp_f_emergency</creatureMetaData>
Now the ‘mp_m_freemode_01_mp_m_emergency.ymt’ and ‘mp_f_freemode_01_mp_f_emergency.ymt’ files need to be modified with YMTEditor, change the first ExpressionMods property to -0.5 for all of the P_HEAD prop entries.
If you’re not familiar with correcting hats/heels with YMTEditor follow this tutorial by grzybeek: [How-To] Create addon heels OR hide hair with addon hat