I updated Caius's dialogs about the Blades trainers. You will now get a quest to go visit all of them. They in turn will give you a gift or advice, just like they did in TES3. I have not made any of them trainers, though Nine-Toes is already a sneak trainer from the trainer mod I already uploaded.
Some issues - This updates a few scripts that are packed in the BSA file. Therefore, they won't work unless you already extracted and removed the BSA. Also, since some of the trainers are behind locked doors, you won't get a dialog with them, they just tell you to get out.