I would like to see some utility; not to sure exactly what, but something else besides the group stealth ability would be great.
I would like to see a healing CD; something along the lines that make your next 2 or 3 abilities guaranteed to crit with a cooldown that is about 60 seconds long. This would allow us a greater amount of emergency healing power sense KI+SP=8-10k if they both crit.
I would like to see the over-healing of kolto probe stack up to 20% as a reactive heal, this would allow us some ability to increase the total health of a player, much like how sorc's bubble does, and wouldn't cause homogenization of the healing classes.
It has been stated that there are plans to change RN, so not really a need to mention it. DS works good if you know how to mange your energy and not let it drop below 40-45, and have good crit gear.
Infusion has it uses, they are few and far between, but they do exist. I am not to sure of a great way to change the ability without causing us to be overpowered, and or needing to change everything else in a drastic way... therefore i say leave it alone...