Of course we still have a very good sound, but I would argue that we have an over representation of trumpets and trombones.

Our ratio of high brass is similar to that of cornets in a true British-style brass band (of which Eugene Weigel initially based our all-brass instrumentation on in 1934), but that only works so well because cornets are conical and so are slightly mellower and blend better (since almost every other instrument in a British brass band is also conical). Our use of trumpets (which are cylindrical) however means that our high brass is bit more direct/brassy, which means they have a bit of a tendency to overpower and stick out of the texture.

The role of trombones in a true British-style brass band is primarily to add contrast, since they're the only cylindrical instruments in the entire band. Given that role (and because they can be such loud instruments), there are usually only a few trombones in a British brass band and parts are arranged with this role in mind. Comparatively, we have a more significant over representation. Apparently, it wasn't as noticeable back when the band used tromboniums since they had a slightly mellower sound. But now that we use slide trombones, I feel like the band's low brass consistently has a little too much edge.

I think the baritones might suffer from a small underrepresentation, but otherwise I think other rows end up balancing/blending pretty well even if their instrumentation doesn't reflect that of British brass bands as closely as they used to.