Except we don't really have to use it more if you play well. The only time I find myself using Benefic II all that much is if the tank is taking heavy damage to where Double HoTs and Time Dilation plus the occasional Bole isn't enough mitigation to allow me to only Benefic I spam. But that's a situation of us needing better emergency healing CDs and not a base potency issue. Although even then, sometimes the duration of Lightspeed is all the Benefic II spam you need, outside of the harder level 60 content which is really what we need better CDs for more than anything.
