The Lancer's role would be to exclusively provide an anti-fighter screen to the larger star destroyers, much liker the smaller escort destroyers that provided anti-aircraft screens for the carriers in WW2, and as such would be deployed in a tight formation with the star destroyers. It would be almost totally useless against even corvette level capital ships, with that in mind I could see it having 3, even 4 anti-fighter dice. Like the Strike Cruiser, I think the Lancer and the Gunship are an inevitable release.
I'm predicting the Strike Cruiser for wave 2 along with the Dreadnaught for the Alliance (though the Dreadnaught is slightly larger, the Strike Cruiser is much more modern), and the Lancer no later than wave 3.
Wave 2 was spoiled a little while back. ISD and MC80.
And MC30c Frigate and Raider.
And a bunch of 1-ship squadrons, like the Falcon.