| If I was going to change Hospitaler's Blessing to a once a round feature, I'd give the class something else to compensate. For example:
Hospitaler Paragon path:
Hospitaler’s Blessing (11th level feature): Change to “Once a round, when an enemy that you currently challenge attacks one of your allies, whether the attack hits or misses, that ally regains hit points equal to one-half your level + your Wisdom modifier.
Hospitaler’s Action (11th level feature): Change to “When you spend an action point to take an extra action, each ally within 5 squares regains hit points equal to one-half your level + your Wisdom modifier. | 
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