Body of Fire and the Fast Fire spell giving Great Haste (Altered Time Rate) as trait?

[Plane]

M73 mentions how the FF spell functions as Great Haste on people with either the BOF metatrait or who are fire elementals, whose racial metatrait is relatively similar.

GH on M146 mentions this functions like having the Altered Time Rate advantage (B38)

This seems like sort of a "free benefit", I'm wondering if perhaps there should be some kind of "Fast Fire functions as Great Haste" perk that should be purchased for fire beings able to benefit from this?

Otherwise I'm not sure which part of the metatraits actually signify the ability to benefit.

If it's considered a 0pt feature then is there some kind of balancing drawback?

I noticed M73's "Slow Fire" has a similar relationship: it functions like "Slow" on fire elementals and those with the BOF metatrait...

M145 mentions Slow gives a level of Decreased Time Rate, so it's kind of a similar relationship...

So would this be a 0pt notation for any being you want to designate as "made of fire" who gets "Slow Fire is Slow" and "Fast Fire is Haste" ?

Given it would be weird for anyone to get this, since it's probably a net advantage if undetectable (nobody would think to cast Slow Fire on you if you weren't obviously made of flames, but you could tell your mage friends your secret and they could haste you) perhaps an additional drawback should be "you look like you're made of fire" so you can't appear to be made of water and get this?

Other prereqs which might be reasonable for such a feature would be whatever traits Small Fire Elemental and Body of Fire have in common which seem related to fire, such as:

1) at least one die of Always-On Burning Attack aura (perhaps less?)
2) Doesn't Breathe (Oxygen Combustion)
3) Immunity to Metabolic Hazards
4) Injury Tolerance: Diffuse
5) Weakness to Water
6) No Fine Manipulators
7) at least 10 levels of DR to Heat/Fire (perhaps less?)

Extra stuff present in only one of them (Charisma, No Manipulators, fixed 0 ST) could probably be ignored as non-essential to get the feature?

"You look like you're made of fire" sounds like a bad thing if it tells people your strengths/weaknesses but I wonder if it might be a good thing if you WEREN'T made of fire since it could lead to people making pointless attacks on you like shooting you with a squirtgun or casting Slow Fire on you pointlessly. Would that be some kind of perk for non-fire creatures?