Tested on v4.04a_REDkit_Update_2, mid-playthrough save and Roche's Summoning ability works fine. I have about 80+ mods installed, including BiA - UE, Gwent Cards Retexture, Gwent Cards Restored, Gwent Opponent Names and Portraits, Gwent Real Stakes and so on. 

HOWEVER, when I start a new game, something weird happened - no cards on the deck except Leaders (see below). After uninstalling this mod and re-merge the scripts, things went well as usual. I presume there might be conflicts among these mods causing the Gwent system failed to re-boot and this one should be installed during you current playthrough.

Gwent_Rebalanced_Issue_2

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