to answer the OP - no.
and one of the main reasons is that TW3 doesnt fit as well to mods. skyrim allowed you to be whomever you wanna be - a male, female, elf, orc, mage, archer, thief, warrior, with a shield, with a dagger, with TWO daggers.... whatever you wish.
it had many weapons that are really different, many different spells, much much more options and much more open ended gameplay. that on itself makes the game more mod-friendly it terms of what options you can add. in TW3 you cant be anything other that a sword wielding witcher - the signs will be the same, you wont be able to carry a two handed weapon using the NPC animations (most likely), you wont have stealth, no archery, no new mechanics.... and without the ability to edit the game world than there are just a lot less to mod in the game... even if we get the right tools.
i wish it will be as good as GTAIV and GTAV are. no official tools but ppl mod a lot of really cool stuff in. great scripted stuff. again - GTA allows a lot more than TW3 does, so the potential is greater.
i really wonder what ppl will make with the modkit.... regardless of if redkit2 every comes out or not.