For starters, let us take a look at the Core cards.
Each faction has 40 cards, while the common pool of neutrals has a staggering value of 148 different cards.
On expansions, this shifted for 13 per faction to 16 Neutrals.
While the numbers are no Hearthstone and i’m thankful for that (less is more), i feel this heritage to the game is an issue to discuss - for i feel this bogs down faction identity heavily.
I come from a full Shadowverse background, never ever touching the original big boy icy dinosaur. This makes me come with a baggage of ratios much, much more favoring factions over neutrals - looking at the Basic/Standard pool, we have 53 per faction (sans Portal) and ‘measly’ 32 Neutrals, standardizing to 13/10 in the expansions. This, i feel, is a most significant trait on making things fun and unique, as this pretty much ensures most cards can be balanced around specific factions using and not at them becoming an universal problem, as we saw with Skorn when rotation happened and we got Krater as it, except Magmar.
While i can’t exactly ask to retroactively review it on expansion content, i can question that regarding the core package and future updates. It really could be a handy choice to check on the list which cards could be permanently bound to factions and maybe reworked a little to factor that. 14 per faction and 10 neutrals in future expansions could be a wondrous metric to get things slowly right.