That's a very good thought. I don't think it works though.
If the animal is entirely white when fired down then a little pink when fired up, it's not high pink. If the animal is white when fired down then it will not be truly high pink when fired up. At least to my knowledge, leachies don't work like that.
I think these animals are for the most part coming from one of the biggest leachie breeders, who sells animals using this terminology. However, if he's selling hatchlings, the term doesn't apply to the actual color or pattern of the animal, but instead indicates that they came from his "high white" or "high pink" line. It's not what I would do, but it's his line so he can do what he wants. I'd prefer to see terms that indicate what the animal looks like kept out of line names until the traits can be a little more predictable and actually show up in most of the offspring. There is another breeder that a line of animals called "pinky". This is different, since it's obvious that the term refers to a specific line of leachies.
However, the term should stop being used when the animal matures and does not at all show the color or pattern.
Here are a couple of examples of what most people would term "high pink" and probably would label "snowflake". Even though it's probably valid to do so I will never use these terms for them, but that's just me. But it will always bug the heck out of me to see a white leachie called pink, or a normally blotched animal called high pattern. Why? Because I have NO IDEA if the animals they produce will be high pink, high white, high pattern or the ugliest leachie you've ever seen.
Notice how this animal has pink blotching even when fired down. It's less pink, but it doesn't just go away.
Fired down
Fired up
This one has been called a "snowflake" by others.
So what should I sell their offspring as? "High pink snowflake"? What if they look like normal, run of the mill leachianus? Nah, they'll be sold by locale and there will be a pic of both parents in the ad.