So, random comment from a scrub who's played a while;
Seriously, what's with everything being agile. When I started playing months ago, agilie was a bonus, something either needed by the card to function well (anti-weather guys, some buffers, etc), but perhaps 20% of your units had it. Now, nearly everything appears to be Agilie, while fixed row characters are an extreme rarity among cards. Even when it's extremely counter intuitive, you slap swift on as a default without thinking (agile catapaults? Agile heavy fighters?). The ability to be swift really should be looked at, both to fit theme and only given when it's needed by a mechanic (Frost Giant, Frightener, etc). This limitation was interesting from deck construction, how to balance yourself to not be too spread out or too clumped depending on the needs of the deck and the counters present in the meta (hailstorm, potion buffs, things like the Ambush buff elf), and on counter tactics, identifying which decks tend to clump where to place weather, traps and how to use Igini, Aard and similar effects.
I really think CDPR should take a long hard look at their row placement. As it stands, it's a mechanic that is almost not a part of the game anymore, and if so, why keep it? Just have three unlabeled rows and roll with that, otherwise, they really need to cut back HEAVY on agile (like remove 40 to 60% of the Agile cards into fixed rows). You could even meet in the middle, having some cards have two valid rows (Catapults are Siege, ballista / light artillery could be siege / ranged, etc). You could even look at 'required' agile cards and set them to fixed rows, but in exchange, buff their power to compensate for that limitation (i.e make Frost Giant melee only, limiting his mechanic heavily, but perhaps he's +4 Power, or deals 3 Damage base, or whatever the balance point needs to be).
As it stands, things like weather or hailstorm, or igni almost excuslively punish mistakes for over filling a single lane, and counteract buffs, but they lack a strong deck build overall strategy.