I think it is a difficult and inconclusive comparison. Under the present scoring system skaters are encouraged to do X number of moves from a list of steps, turns, and moves in the field. If you do X+1 of them (with satisfactory quality), then you can hope that the judges counted correctly and you will get a higher TR mark, and maybe also SS.
Not really. The list of X number of steps and turns only applies to the levels in the leveled step sequence. Any steps, turns, and moves in the field that are performed in the middle of a leveled step sequence or choreo sequence would count toward the score for that sequence (and might affect the score for Skating Skills). But they wouldn't affect the score for Transitions in any way, because the Transitions score applies to moves done between the elements, and as entries and exits to elements, not in the middle of elements.
What would be more relevant would be to say that under IJS skaters are encouraged to do X number of jumps, spins, and step sequences. If they do an extra listed jump (e.g., a split-flip), or an extra sequence of steps or field moves (e.g., a full length of the rink leading into the short program solo jump), we can hope that the judges recognize that those moves are not part of an element and credit them as transitions. Usually it's pretty obvious, but in freeskates sometimes the ladies and pairs especially are so perfunctory in executing their choreo sequences that I'm not always sure if they just performed an element or if that was just a transitional move or two.
In 20th century free programs, step sequences and spiral/field moves sequences weren't required, so looking at historical programs with IJS eyes means deciding whether to count some of those sequences as elements or as transitions if we want to compare those programs to recent ones.
Also, for low-revolution jumps with variations such varied air positions, depending on whether they count as listed jumps and when they occur during the program, IJS rules might consider them as filling jump boxes (and blocking later triples from counting). But in 6.0 era late enough that multiple triples were expected, judges probably considered those highlight jumps more as transitions and we should apply the same logic in looking back at past programs.
Under ordinal judging, although skaters were told by their coaches to "work on your in-betweens," it is not clear how busy feet translated into a higher second mark. The fans (I am not sure about the judges) were more impressed by graceful upper body movements and pretty positions.
Depends on the fans, probably. E.g., I remember wars between Boitano fans who favored simplicity and big spread eagles, vs. Orser or Browning fans who favored quick feet.