How are speed and ice coverage subjective and qualitative? They don't seem to me like difficult things to measure and assess.
How do you propose to measure them?
Maybe sensors or radar guns of some kind could tell us exactly how fast the blades are moving across the ice. I don't know if appropriate technology currently exists or would need to be developed.
Keep in mind that you need to measure not just the time it takes for a skater to get from point A to point B, but also the length of the actual path that s/he travels to get there -- in general, skating prefers deep curves to straight lines, and on circular or serpentine sequences there will be lobes curving on either side of a the theoretical rink-width-diameter curve.
This is also why it would be incorrect simply to time how long it takes a skater to complete a circle or a straight line from end to end. Obviously it would be easier to complete the path in less time if one is doing fewer steps and turns and/or traveling on shallower lobes.
If humans assess speed and ice coverage by watching, they can only estimate based on the visual impression of speed across the ice or size of the curves. Different people's perceptions may vary, although where there are significant differences between skaters watchers should be able to agree on who was faster or who had a bigger pattern. Unlike with compulsory dances, it probably won't be possible to use the tracings on the ice to gage the latter. Even with CDs it's not always obvious by the end of the second warmup group after the resurface.
How could you set a criterion to determine whether the skater does or does not meet the "speed" or "ice coverage" bullet point?
If you're just relying on humans watching and estimating, they're also going to have to estimate whether each skater achieved "enough" speed or ice coverage or not, since human brains don't have a set representation of X miles per hour permanently fixed within them.
If you set a bullet point criterion of X miles per hour and had some way to establish whether each skater achieves it, should X be the same for a 4'6" 70-lb novice lady and a 6' 170-lb senior man?
Even if you set a different value of X for each level of competition and each discipline, what happens when you have a 4'6" 70-lb 13-year-old junior competing against a 5'8" 130-lb 18-year-old junior in the same event? For the same level of technique, the taller skater with larger muscles will achieve more absolute speed and larger curves. For the same absolute speed and lobe size, the smaller skater will be demonstrating superior technique.
So how do you decide when each has achieved enough to qualify for the bullet point? That's not a decision that can be easily quantified.
I'd like to have speed, accleration and ice coverage become additional features for determining levels.
As I said, I don't see how you can quantify what would be sufficient speed or ice coverage.
Acceleration might be something that the tech panel can look for and agree whether or not it is present, as they do with acceleration in spin rotations and as with the determination of "quick changes between steps and turns" feature for step sequences.
Are you suggesting sort of a combined steps/moves in the field sequence?
Well, in the long program I would like to see a field moves sequence as another option.
In general, whether that occurs or not, we have seen half jumps and low moves or brief spread eagles, etc., incorporated into step sequences in the past and some skaters still use some, but they don't add to the level, unless they contribute toward the variety of "steps." If there are any such moves that can be considered worth rewarding, maybe defining a way they can contribute to the level of step sequences would be a good way to reward them.