I'd exclude either both the HBD and HIVE in DHF or neither. There is reasonable precedent to go either way. Status quo and not making unnecessary consensus changes leans toward leaving it alone. Doesn't seem that important.

Debt is a bit different because it depends on the conversion operation which is impossible within DHF.

Also I don't think it is a given/certainty that HBD in DHF will grow. It depends how fast it is spent. For now we haven't been spending it very fast (stabilizer which gives it back doesn't really count as spending), but that's a stakeholder voting issue, not inherent.