Well yeah this kind of addon would be highly usefull, and to broadcast the cast totems to the addon users (possibly a hidden channel for the addon?) and also the ability to quickly replenish the totems already up if needed.
I know theres addon bars & boxes to hold the totem spell icons but an actual addon to coordinate totems in a raid... we'd definetely need one.
As i see it the principal idea behind is simple enough that some addon maker probably could do it in a day?
Well thats my input, sorry for the bad english and kinda adhd writing style