@Ecky-thump that seems to be the main failing of pawl and spring freehubs , especially the ones that pull straight off , they get clogged with grit and water then fail. Didn’t think of syntace never used them but if they work for you worth a look.
I don’t mind the maintenance with Shimano hubs it’s a 5 minute job but the main gripe people had with them was the freehub strength and them failing.
Dt Swiss hubs with the original 18t engagement seems like the best option for strength and reliability but not sure if it’ll be enough engagement I do like technical climbs and moar engagement would help with that.
Hopes warranty sounds good though so leaning towards keeping them.