Trombone and Tuba Balance Issues

I've been using the Musescore notation software for quite some time now and I've noticed that one issue that seems to be overlooked in every update is that the MIDI file for the trombone is consistently way too loud and the MIDI file for the tuba is consistently way too quiet. What happens is, if I have an ensemble (even a full orchestra or band) where every instrument is playing at the same dynamic, the tuba is very hard to hear (even though it's the bass voice and should usually be slightly louder than everything else) and the trombone sticks out like a sore thumb. This doesn't change at all when any instruments change in range, and for the most part everything else stays relatively balanced other than the trombone which is consistently WAY too loud.

I understand that being able to manually change the volume of each instrument is a Pro feature and that is something I could do to fix this, but I feel like the default version of the software should have a much better natural balance than this.