In other LCG's, a constant that says "This unit may enter play as an enhancement ..." is considered a permission, and it's been defined that the term "enter play" contains the subsets of "play" and "put into play", covering both. In those games, this constant allows this card to satisfy the step 1 check (ability initiation) for abilities like deploying an enhancement or putting an enhancement into play - because it's permitted to enter play as such. It's also obviously acceptable for the card to be deployed/put into play in step 6 (effect resolution).
For more detail, Shadowsun Stealth Cadre is worded in exactly the same manner, and a tutorial vetted by Nate French can be found here:
http://www.cardgamed...bush-platform/
Also, in other LCG's, a replacement effect is defined by containing the word "instead". My understanding was that it was the same for Star Wars, but they've decided to go another path.
In Star Wars it's being ruled that constants that say "a card may enter play" is a replacement effect, keyed to the timing point of when something actually physically enters play, at which point you choose which of the two allowed forms it's going to enter. When an ability like "put a unit into play" is being resolved, Wedge/Luke's constant allows it to effectively replace the resolution of that effect with "put an enhancement into play".
It's unclear to me at this point whether this type of constant is also still considered a permission in Star Wars, so that the card passes step 1 for both "put a unit into play" and "put an enhancement into play" effects while it's physically a unit in the hand, or whether it cannot satisfy step 1 for "put an enhancement into play" effects because it's physically a unit in the hand. That may have been ruled on previously in this forum, but I couldn't see it after a quick check.
Here's the next part ... put into play effects are in the form of "put {card} into play {in this required state}". An example is Infiltration where the required state is "as a participating unit" (but another example of a required state might be "exhausted" say, or "under an opponent's control" even). This ruling, that Infiltration allows Luke/Wedge to enter play as a unit without having to satisfy the required state of being a participating unit (because Infiltration's card text is overriden by Wedge/Luke's text), creates a precedent that these replacement effects are permitted to ignore any specified required state.
If this precedent holds and is true (as opposed to just being a one-off ruling for this interaction), there are repercussions, shown by example:
a.) if I have an ability that says "put a unit into play exhausted", I'd be allowed to ignore the required state of "exhausted" and can put Luke/Wedge into play as either a non-exhausted enhancement or a non-exhausted unit (because the default is ready)
b.) if I have an ability that says "put a unit into play as a participating unit", then Luke/Wedge can enter play, but because the "as a participating unit" required state is replaced/negated by Luke/Wedge's constant, it cannot actually enter play as a participating unit, it just enters as a normal unit, ready and non-participating.
Anyway, these were the types of arguments put forward in regard to this issue, but in the end Star Wars has decided to rule these permission effects differently from the other LCG's. Without the use of "instead" to guide what are replacement effects and what's not, we'll just have to seek rulings on them as they arise. Personally I'd prefer these types of effects to be ruled the same way as they are in the other LCG's and I've argued for them to be so, but a decision has been made that they're not going to be, so it is what it is.