They should addthe function to Witcher 3 like betheda does it for their planned improved remaster fpr Elder Scrolls Skyrim on PS4/X1 which allows you on the consoles via internet to download Mods that have been invented originally for PC and have been converted over to work for the consoles as well
they need also to release finalyl the red kit, so that Modders in the world can work on new player custom content for the game as well as also like bug fixes ect so that the devs don't have to do all th tiem the work for fixing bugs ect. and make patches with silyl certification processces from Sony/MS, but with the redkit and modders being able to share their custom made works with everyone with a system ,that allows players to use all these Mods also for the console versions, CDPR would be able then to focus alot more on workign on Cyberpunk, while the Witcher 3 community woudl receive more power to maintain itself with new content and fixes via the help of many skilled Modders and Programmers that are out there...
What Betheda can and will provides us on PS47X1 with access to all the PC Mods to customize ypour game or to enable to to use various "Cheats" if you want to get that way more fun out of the game for you, then i think something like that should be easily possible for CDP do do so as well for this game
I think its a very necessary step for Witcher 3 to make the game for the future more independent without that devs have to keep permanently they eyes on the game due to havign to make patches for fixing alot of things.
that way could receive this game also many improvements for that CDPR seems to be not willing anymore to invest any effort into the game, because they are already too much focused on working on cyberpunk 2077 and the idea to stop with the witcher universe