I am assuming that you are referring to lay audience rather than judges? I was just looking at what goes into GOEs for jumps. 1. Unexpected, creative, or difficult entry; 2. Clear recognizable steps/free skating movements immediately preceding element; 3. Varied position in the air and/or delay in rotation; 4. Great height and/or distance; 5. Superior extension on landing and/or creative exit; 6. Superior flow into and out of jump and throughout jump combinations/sequences. +1 = 1 to 2 bullet points; +2 = 3 to 4 bullet points; +3 = 5 to 6 bullet points.
Understand that unlike the men, ladies may find it much harder to do a 3A out of steps or through a difficult entry the way Han Yan and Yuzuru enters into their 3As. However, I think Midori Ito and Tonya Harding were both able to get points number 3 and 4 and Liza has a really good extension and smooth flow out of her jump exits. If she can hit points 3 and 4 and 5, I do believe that she can arguably receive +2 GOEs. Of course there is some degree of subjectivity, like what looks like good flow, great height etc. I suspect Asada could only reliably depend on point 4 and 5 but not the others consistently, so most often, she will only get a +1. If she gets hit by an UR call, then -2 will tag on and she ends up with an overall -1 to -2 GOE. Of course to lay audience, these -ve GOEs are outrageous as the UR may not be so apparent and certainly not disruptive to the element but judges have to apply negative GOEs.
Personally, I think if Tuks can gain greater ease and confidence in the 3A in competition, she can potentially get better GOEs than Asada due to her stronger jump techniques. Whether she can also develop the musicality and audience connection like Asada will be the greater unknown - I think this will be even harder to attain.