Also, in case no one at Blizzard is aware (I haven’t seen it mentioned anywhere), weapon illusions were NOT saved in the “Custom Set” that the system created when the new transmog interface and system was implemented.
So that’s another “gotcha” when you apply the “free” transmog, because if you did have weapon illusions before the update and don’t specifically apply them before using this free transmog, you won’t get them free.