For me this is all all rather like finding I have been living nearby to a kindred spirit and never knew he was living just round the corner.
In cases like this we often find that we are reviewing the composer, rather than the specific musical performance. To many classical enthusiasts Tubin remains 'new'. I have heard no other alternative performances against which to measure these efforts by Neeme Jarvi which were laid down as long ago as early-mid-eighties.
But, while Tubin was almost exactly contemporary with Shostakovich, he was clearly more of a 'half-glass full' kind of fellow. He appears to occupy an 'in your face' space somewhere between Rachmaninov, Madetoja, Vaughan-Williams, Richard Strauss, Bartok and Sibelius. His music is well-orchestrated, dynamic, imaginative and reasonably concise.
If you wish any or all of those (above-mentioned) composers had written more symphonies and orchestral music - and more aggressively - then I urge you to explore these. You will also find an individual voice, but the Scandinavian influence is inescapable.
Beautiful, clear BIS recordings and good value.