Codex is astonishingly well balanced, as you would expect for a game 10 years in development. Given the wealth of options offered by each individual spec, and the vast playing field of possible combinations when played together with other specs, the balance in this game really is simply extraordinary.
We are not yet a year into the public life of the game, and clearly the metagame is still developing, however already it has become clear that some cards are getting very little love (e.g. Arresting Constable), whereas other cards are played practically every time a player chooses a particular spec (e.g. MoLaC for Growth, Drill Sergeant for Peace etc).
So for kicks and giggles, here are some suggested changes to buff some under-played cards, and nerf some overplayed ones, in order to broaden the options available to players. Let me emphasise again - these are merely ‘nudges to the tiller’, rather than a huge change in direction. I don’t want to ruin such a finely tuned game!
[details=Neutral]Troq - amend level abilities to topband: upon attack 1 damage to base, midband: upon attack: 2 damage to base, maxband: readiness
[details=Red]Jaina - lower level bands 1-2, 3-5, 6
Scorch - lower cost to 2
Careless Musketeer - amend ability to increase damage and risk: deal 2 damage to unit, 2 to your base
Rickety Mine - amend ability to draw a card upon arrival, heads: 3 money, tails: 3 money, destroy mine and 5 damage to your base
Detonate - add: draw a card
Calypso Vystari - for fluff this seems like it should be legendary since it is a named unit?
Double-shot Archer - amend ability: when attacking deal 4 damage to base [/details]
[details=Green]Might of Leaf and Claw - increase cost to 4
[details=Blue]Bluecoat Musketeer- amend ability to remove damage caveat on long range
Jurisdiction - add draw a card or lower cost to 1
Guardian of the Gates - amend stats to 2/6, amend disable ability to affect heroes as well as units
Arresting Constable - amend stats to 2/4, amend ability so that it can disable 2 units
Debilitator Alpha - amend ability to affect heroes as well as units
Drill Sergeant - lower stats to 2/3, increase cost to 4[/details]
[details=Black]Vandy - remove resist 1 on midband
Garth - lower stats to 1/3, 2/3, 3/4
Sacrifice the Weak - amend wording to sacrifice one of your unit, and target an opponents weakest unit
[details=White]Birds Nest - increase cost to 3
Earthquake - increase cost to 6[/details]
[details=Purple]Vir - increase maxband stats to 4/5
Tinkerer - lower cost to 1 and stats to 1/1
Forgotten Fighter - remove damage caveat on bounce ability
Sentry - increase stats to 3/3
Knight of the Conclave - this needs to be better somehow, but increasing any stats would make it broken. Perhaps add readiness?