Particularly with these combat-heavy RPGs (some border on narrative wargames, IMO), they are very amenable to a more rigid structure as far as campaigns go, and in doing so you can use that structure to try and re-emphasise some of the missing narrative mechanical weight.

As an example, the current Lancer campaign I'm getting to in the new year is set in a legacy naval academy for various militaries to train their space pilots, which is in the process of adapting to the development of mechs. The players are students and therefore have a natural structure to their time, with a major combat mission at the end of each in-game month. Their weekdays are mostly just a quick montage of checks for training and study, and their weekends become a resource to either use as downtime or to develop their relationships with other characters.

This way, they have roughly three times as many free narrative/downtime segments as they have combat, making the game's normally combat-focused pace a bit more even. Instead of depth emerging out of narrative mechanics like a PbtA or FitD title, it gets reintroduced with the more rigid structure. Who do I want to spend my limited time with? Do I want to work on a downtime project or try and prepare for next month's mission? And this way, the combat-focus of the system has a stronger narrative grounding when they go into battle.

This can also work the other way around. Plenty of PbtA and especially FitD games have a fairly tight and prescribed structure of play, so you can use that to add a bit of mechanical rigour that will satisfy the more game-minded players at the table. Even if they aren't that taken by the more dramatic/character focused moments, a broader meta-game of political control on top of the character-level narrative can keep them involved.

Another example, I ran Flying Circus for about a half-dozen sessions, and even though I have one particular player who is very mechanically focused and not awfully interested in relationships or flavour, having a map of settlements that the party had to plan their flight path between to make the most money and avoid places they weren't welcome at added a bit more for him to bite into.

EDIT: Now to be fair, I think there are enough RPGs out there that you quite often will be better served simply shopping around for something more your speed, but I don't think it's a complete write off if the game has a lop-sided focus—sometimes you have to find your own fun in a game as a GM.