Throughout the Regional season I've been studying the game intently and have gotten a ton of play experience, and I've noticed some of the components of a list that make them effective in the current meta. I've come up with a list of these components with some examples for those that are not obvious:
Pilot Skill Level
Primary Weapon Turret
Large Base Boost
Stress/Control
Autothrusters
Heavy Laser Cannon
Damage Mitigation
Action Economy
Action Independence (ex. Predator, C-3P0, RAC ability)
Action Denial (stress+ion, blocking)
Forced Damage (ex. Gunner, IG88-B ability, Vader crew)
Critical Damage
Now looking at the regionals results, there are 4 lists that have appeared a high percentage at the final tables:
Brobots (most IGB&C)
RAC/Fel
Dash/Corran
Han+3Z
Now let's look at how proficient these lists are in the categories I detailed above.
Brobots: 8/12: Pilot Skill Level (VI), Large Base Boost, Autothrusters, Heavy Laser Cannon, Damage Mitigation, Action Economy, Forced Damage, Critical Damage
Brobots are very versatile and can be built in many different ways, but some of the staple upgrades are VI/PTL/Pred for the EPT slot, Adv Sensors/FCS, Autothrusters, and HLC or Mangler Cannons. Because of their versatility they might sacrifice some advantages over others depending on play style.
RAC/Fel: 10/12: Pilot Skill Level, Primary Weapon Turret, Large Base Boost, Stress/Control, Autothrusters, Damage Mitigation, Action Economy, Action Independence, Forced Damage, Critical Damage
With the standard set up of RAC with Pred/VI, Gunner, Rebel Captive, Ysanne Isard, Engine Upgrade, and Soontir with PTL, AT, Title, Stealth Device/Shield Upgrade, this list boasts 10/12 categories that are, in my opinion, successful in the current meta. It is no surprise that this list has won so many regionals.
Dash/Corran: 5/12: Pilot Skill Level, Large Base Boost, Heavy Laser Cannon, Damage Mitigation, Action Economy
Typical list includes Dash with PTL, HLC, Title, Kyle Katarn, Engine Upgrade, and Corran with VI, R2-D2, and FCS. Most might throw in Dash with PWT's, but frankly he plays very differently, and has a serious weakness that can be exploited by any PS8+ pilot. What this list lacks in these categories it makes up in raw power and mobility.
Han+3Z: 7/12: Pilot Skill Level, Primary Weapon Turret, Large Base Boost, Damage Mitigation, Action Independence, Action Denial, Forced Damage
The typical Fat Han build comes with Gunner, C-3P0, Engine Upgrade, Predator/Lone Wolf, and the title. Depending on the opponent, the 3Z's are used to deny actions/maneuvers by blocking to keep Han safe. With Han's ability, Predator, and Gunner, he's able to keep the damage going while focusing on evading if he's taking heavy fire.
Hopefully this helps identify what to include in your lists to either combat the current meta, or join it. I'd like to hear your thoughts and if you think there are any other components/lists that are driving the current meta!