This is my first post on these forums so I thought I should list off what I think Armada should have in upcoming waves.
Galactic Empire
1) Venator-class Star Destroyer (1137m) Medium or Large base ship is debatable, as it's between the Interdictor (1129m) and MC80 Liberty (1200m) in size
2) Dreadnaught-class Heavy Cruiser (600m) Medium
3) Carrack-class Light Cruiser (350m) Small
4) Strike-class Medium Cruiser (450m) Small
5) Lancer-class Frigate (250m) Small
6) Secutor-class Star Destroyer (2200m) Large
7) Allegiance-class Battlecruiser (2200m) Large
? Praetor II-class Battlecruiser (4800m) Very Large
There are obviously more I could list for the Empire but I don't want to type all day. No real need to explain 1), everyone wants the Venator in this game, and Episode III shows Imperial Venators on screen. 2) has a large following as well, and has been somewhat re-Canonized, but I prefer the original. 3) and 4) are meant to be more versatile than Arquitens or Raiders, since those ships tend to preform badly unless you build around them. 3) also has the benefit of being Canon. 6) is Canon thanks to the Tarkin novel, and even has a title card (Conquest). 6) and 7) are not dramatically larger than ISDs, maybe an inch longer on the tabletop so their inclusion isn't a Executor-class headache to implement. ? is exactly 3 ISDs long, which is a 24" long ship, which is what some people believe is an acceptable length for the Executor that I don't agree with.
Rebel Alliance
1) Assault Frigate Mk1 (700m) Medium
2) Lucrehulk-class Battleship (3359.9m by 3009m) Very Large
3) Dauntless-class Heavy Cruiser (1200m) Large
4) More CIS salvage/captured ships
I want 1) mostly because having the MkII without the MkI bothers me more than I'd like to admit. 2) is the best counter to Imperial Very Large ships, and has Legends and Canon presence in Rebel Fleets. 3) has been re-Canonized under the name Marsheem-class, and would be the first non-Mon Cal large ship available. 4) has many examples in Legends, and has been hinted in Canon. This would allow massive variety to Rebel fleet builds and would be excellent for role playing Separatist Holdouts.
This is of course all my opinion, and I am interested to hear what you guys think about my list, and hearing your Armada ship lists as well.

