Played a bit more of it, unfortunately i ran into a bug.
107677 [Thread-6] ERROR com.fs.starfarer.combat.String - java.lang.RuntimeException: Ship hull variant [trade_TradeDrone_Hull] not found!
java.lang.RuntimeException: Ship hull variant [trade_TradeDrone_Hull] not found!
at com.fs.starfarer.loading.L.super(Unknown Source)
at com.fs.starfarer.loading.SpecStore.super(Unknown Source)
at com.fs.starfarer.campaign.fleet.FleetMember.super.float$Object(Unknown Source)
at com.fs.starfarer.campaign.fleet.FleetMember.<init>(Unknown Source)
at com.fs.starfarer.campaign.fleet.FleetMember.<init>(Unknown Source)
at com.fs.starfarer.campaign.CampaignEngine.createFleetMember(Unknown Source)
at data.scripts.world.TradeDestroyerSpawnPoint.addShips$(TradeDestroyerSpawnPoint.java:94)
at data.scripts.world.TradeDestroyerSpawnPoint.spawnFleet(TradeDestroyerSpawnPoint.java:49)
at data.scripts.world.BaseSpawnPoint.advance(BaseSpawnPoint.java:61)
at com.fs.starfarer.campaign.BaseLocation.advance(Unknown Source)
at com.fs.starfarer.campaign.CampaignEngine.advance(Unknown Source)
at com.fs.starfarer.campaign.A.super(Unknown Source)
at com.fs.starfarer.OoOO.øÒÒ000(Unknown Source)
at com.fs.super.oOOO.Ò00000(Unknown Source)
at com.fs.starfarer.combat.String.o00000(Unknown Source)
at com.fs.starfarer.StarfarerLauncher$2.run(Unknown Source)
at java.lang.Thread.run(Thread.java:619)
Otherwise i tested some other ships. The Illuminator is cruiser level overpowered if not even more. With 2 large energy mounts, 3 mediums and 3 smalls (with a 360° arc) that thing can slaughter everything. Large mounts are far too much for a frigate, unless maybe if its only weapon. A single HIL for the Illuminator could work but then, you'll need to nerf its speed to avoid making it a kitting monster. For its ship system, it can use something similar to the decoy illusion drone from the Shadow order mod (not updated to 0.61 unfortunately) which basically spawn a copy of the original ship who will draw the enemy attention. Can't remember the ship using it though, a frigate i'm sure, maybe the Wraith?
The Disciple is also very strong for a light frigate. With 4 small energy mounts you can easily unleash hell on frigates and destroyers. 2 small mounts should be more than enough i think.
To come back to the Purge and its shield. I tried to fit the extended shield hull mod and it seems that the tips of its wings are sticking out the shield radius. I don't know if it is possible to get hit there while shielded but in any case it look weird. Also, at a meager 50 armor even asteroids can destroy it, which is a shame given it is supposed to be a pretty heavily armored frigate.
The Iconus guardian is an oddity. It got a lot of weapon mounts for a support ship who is supposed to be barely armed. On top of that, it got a lot of armor at 300 (well, compared to other Advent ships). By the way, in SOASE, the Iconus can project a huge shield to cover its fleet or use a repulsor field. Even though you can't field two ship systems on one ship, you can still choose one. For the shield, take a look at the Neutrino Colossus, it basically spawn an invisible drone with a gigantic shield who can block enemy projectiles but not ships. For the repulsor, the Kurmaraja from Black Rock Driveyard or the Heimdal generator from Thule's Legacy (no 0.61 Version though...) can give you some ideas.
For the presentation, your mod gave me the idea to create a template for presentation, if you're not sure where to start.
http://fractalsoftworks.com/forum/index.php?topic=7156.0