I greatly applaud the removal of requiring the Toughness feat to get Toughness enhancements. 48-108 extra HP for one feat made it near-mandatory for all sorts of builds, which I think is a symptom of poor design. Glad it's going.
But I really disagree with the extra free HP being based on 5-class-level breakpoints. This is another kick in the teeth of creative multiclassing.
If it's going to work out to 1 HP per level anyway, just give 1 HP per level and scrap the 5-class-levels thing.