I personally forget a lot they even exist since they are kind of like a 1-use in battles due to the long cooldown AND shared cooldown.
It could include some perks like (keep in mind this is off the top of my mind and it doesn't go into depth so its a generalization of what could be done.
1. More powerful shouts
2. Less cooldown on them (high on the tree I'd imagine)
3. Maybe have a secondary small effect for certain shouts (example: Fire breath now makes the enemies run around for x amount of time but is a bit weaker or something like that)
4. You hone your voice to extremes, The shouts now affect everyone around you instead of a cone. (Running out of ideas this popped out in my mind, seems a bit OP though. Very high in the tree most likely)
5. Maybe the last perk could be a unique Shout you can only get from that last perk.
These are just some idea that sprung in my mind. Because I really love the Shouts and the main features (in my opinion) Bethesda tried very hard to make them shine is the Shouts and the Dragons, and right now the Shouts aren't doing a very good job (in my opinion).
So what do you think about this? :spotted owl: