So I had my first game with the gun carriage today.
The list I was trying it with wasn't very good, but it performed really admirably (against a bane-heavy Goreshade 1 list).
The high movement is a huge deal, and the trample options give it an impressive threat range. It is particularly refreshing after struggling with our jacks, and seems to fill the spot of a second jack without needing too much focus, generally rampaging around, and punishing anything without pathfinder.
My list was bad, but was put together hastily the night before on the rationale of "I have this new model, lets find a caster it works with, and then fill out points."
Gung Ho Carriage
WGI with everything
Aiyana & Holt
Now in retrospect I should have maybe tried Black Ivan instead of Behemoth, have some more points to take something like Manhunter, but I don't have Black Ivan. Maybe I should have stopped obsessing about AOEs and take Beast (for a broader melee threat) and a Manhunter, just to have a few more models to contest things and get in the way. Wardog is also in here just because I had a spare point after taking everything I wanted, and Sylys was in the second list.
Fire for Effect is a really imposing trick with the carriage with the ruling that all the blast damage is also boosted. So maybe I have an unduly rosy perception of having just played a game with it, but does anyone else have experiences to share with it, and/or get a feel that the gun carriage gives us much of what a second jack gives factions able to properly support one?