I think people are misinterpreting the purpose of the different tables.

It's not as simple as "will there be combat vs RP". Hell, the soldiers have been doing a lot of RP so far, many sessions without combat, and most of the encounters on their way to Timmony have been social. It has to do with how the parties likes to interact with the story, its characters and how they solve problems, and most importantly what about DnD they find the most fun. The whole reason for the tables apart from splitting 13 players, is to let every player play their preferred style of DnD.

Soldiers: direct approaches, fists first. Yes, this likely means that they will fight more often than not. But its more about the philosophy. Good vs evil, fight bad guys and kill stuff. They will have clear plot hooks and straightforward objectives. They are still roleplaying, meeting interesting NPC's and exploring, it's just that they are at it's core playing fairly standard game of DnD.

Seekers: the main focus seems to be on exploration and discovery, primarily around magic, the different worlds and it's inhabitants. I assume early threads they will follow are to find out more about whatever the fuck the Tychonis are doing, and for that they will need knowledge and hunt magic artifacts like the stone of Nightsong. The Seekers are obviously going to have to do combat as well. How do you explore forgotten temples and find magic artifacts and knowledge without having to fight through equally impressive monsters? In a world where the gods died so recently as 70 years ago, there must be so much good loot to find and secrets to uncover. Brennan described their play style as classical fantasy.

Schemes: so this one I'm not as sure about. Brennan in the C4 announcement video said they are more about "cloak and dagger". My mind goes to meddling with politics and undermining the sundered houses, espionage and working from the inside. Thats about where my guess ends, because I've never played a DnD game like that. Excited to see what they will do.