What we know is that the +1 version increase critical hit damage by 5%, +2 by 10%.
If the macro equipping the gear is the same macro as the one for the action, then yes. /wait 1 will suffice.
If you are using separate macros such as: (Alt-1, 2) for gear, and 3 for the Jump Action then no.
We do not know what Enhances Soul Jump Effect means.
What we know that it doesn't do is:
Increase Damage
Increase Range
Increase TP Gain
What it could potentially do that has not been tested:
Further decrease hate on the action Soul Jump (Could potentially be tested with Libra, since it generates little hate at all even when dealing significantly high damage, the test would be pointless.)
Increase Critical Hit Rate when Wyvern is not present (Since Jumps are like regular attacks that can critical, and since Soul Jump is not 100% Critical when Wyvern is not present this would be a logical assumption)
Things to note:
Slightly irrelevant, however similar Wyrm Brais were believed (Never tested thoroughly) to further reduce the Dragoon's Enmity after using High Jump.
Possible that the idea behind "Enhances Soul Jump" is the same as Wyrm Brais.