Well, one thing that I do is I keep a sheet with a list of all of the minis on it, and I make sure that I play every mini. Even as long as Legacy has been out, I still have 2 more squads left before I have every mini played, a Sep with Dooku and a Sith with Nihl. Here's what i played today:
Thrawn
Mas
Imp Gov Tarkin
Moff Veed (needed to play him, and the only reason to EVER play him is if you have Imp gov tarkin.)
Emperor Fel (quad Opp with Thrawn/Tarkin, hehehehe...)
#21 Imp Knight (the other Imperial I needed to play)
Storm Commando
BBSV
Raxus prime Trooper
5 Commanders, 4 followers
I faced: NR Han/Shado/Corran/Karrde and won handily, even with his double Disrupt (using Thrawn aggressively, which I normally do. Silly Jedi.
)
Game 2 was against Republic SS with RCTS. I ALMOST won that match. My last attack was Mas cunning on his RCTS with 20 HP left. I needed an 8, rolled a 6. Would have won me the game.
Game 3 was against VAU and RS Boba, which I won. (Fel almost single handedly took them both out with quad Opps.)
Game 4 was against Lady H with her Rebel SS with Xizor and Dodanna. That was a struggle, but I won.
So, I had 9 activations, and if I roll an 8 or higher in game 2, I go 4-0 with a non-meta squad.
My point is you don't need to play meta squads in order to be effective. Forcing myself to play every mini allows me to know what every mini does. It forces me to play a different squad (and usually faction) every week, and it keeps it fun.
And I'm Vassal-ed out. 3 straight games where the opponent gets 5+ crits, when I normally won't get 5 crits in an entire tournament really makes me question the validity of play testing on vassal.