So far I have seen decklists for 22 Regionals from the U.S. and around the world. The Georgia Regional winning decks were just added.
Here's the data I've compiled in regards to objective sets for the LS.
Updated through decklists from 6/4/16 that have been reported or determined from watching streamed games. Note this is before GA was legal.
221 objective sets have been used - 1 person used 11 sets.
May the Force Be With You 32
A Hero's Trial 25
A Hero's Beginning 18
Asteroid Sanctuary 16
Watchers in the Wasteland 15
Solidarity of Spirit 12
Flight of the Crow 10
Shield Generator Assault 10
Commando Operations 8
Along the Gamor Run 7
Survivors 7
Command and Control 6
Turning the Tide 5
Commando Raid 4
Defense of Yavin 4 - 4
Impersonating a Deity 4
Matter Under Mind 4
Planning the Rescue 4
Strike Team Assemble 4
A Hero's Journey 3
Questionable Contacts 3
Debt of Honor 2
Feigning Captivity 2
Heroes and Legends 2
Journey to Dagobah 2
Running the Trench 2
Secret of Yavin 4 - 2
Ties of Blood 2
Tribal Support 2
Hidden From the Empire 1
In You Must Go 1
Mysteries of the Rim 1
Sacrifice at Endor 1
So far, of the 221 LS objectives that have appeared in winning decks.
57.0% have been Jedi
26.7% have been Rebel
15.4% have been Smugglers
0.9% have been Neutral
Also, 33 different LS objectives out of the 105 available have appeared in winning LS decks. That's 31.4%.
I've also gotten around to determining the number of players who've used at least one copy of set in their winning decks, now that we have a decent amount of data. I did this last year for regional season and the data is also interesting.
May The Force Be With You 16 (so 16 out of the 22 winning LS decks have included at least one copy of MTFBWY)
Watchers in the Wasteland 15
A Hero's Trial 13
A Hero's Beginning 11
Asteroid Sanctuary 8
Flight of the Crow 7
Along the Gamor Run 7
Solidarity of Spirit 6
Survivors 6
Shield Generator Assault 5
Commando Operations 5
Commando Raid 4
Command and Control 3
Turning the Tide 3
A Hero's Journey 3
Defense of Yavin 4 - 2
Impersonating a Deity 2
Matter Under Mind 2
Planning the Rescue 2
Strike Team Assemble 2
Questionable Contacts 2
Heroes and Legends 2
Journey to Dagobah 2
Secret of Yavin 4 - 2
Tribal Support 2
Debt of Honor 1
Feigning Captivity 1
Running the Trench 1
Ties of Blood 1
Hidden from the Empire 1
In You Must Go 1
Mysteries of the Rim 1
Sacrifice at Endor 1