You're over-egging your cake a bit here, Lionel. Acceptably tuned valve trumpets have been around since 1850-ish. Other than Berlioz (his early years at least) the composers I mentioned had the choice of both, and scored them according to their very different tonal qualities. Not on my watch!!!! I suspect that if all 'long cornets' were renamed 'short trumpets', most of the confusion would disappear overnight.