Then why do they exist? You would only go there for the cobalt shield and shadow key, right? (and maybe the muramasa, just for the night's edge)
Dungeon weapons should have more purpose before you get the direct upgrades in the shadow chests. That is why i suggested giving them specific damage buff against hell enemies, so they could have more purpose. Another way to buff them would be to add a boss in progression between skeletron and the Wall of Flesh, that would drop the shaow key for the shadow chests. This would give the dungeon weapons more time to shine. Alternatively, instead of a new boss, the shadow key could be dropped by the deerclops instead. This would also make him more useful to fight, as his drops are mediocre at the moment.
I agree, that is why I suggested giving them a buff, so this purpose would be fulfilled easier.
Yes, that is why i wanted the dungeon weapons to have bonuses against hell enemies. This would make the journey through hell easier.
I agree, but the volcano is still useable if you don't want to do skeletron in pre-hardmode.
The vilethorn and minishark are fine. The vilethorn is held back by range and the minishark has average DPS for the price you pay for it. I'd say that the boomstick is better than it in a lot of situations. The vilethorn and minishark also fall off against the late pre-hardmode bosses. The Starfury does not, however. It is also the easiest to get, as you only have to rope up to the sky a couple of times to get an island, or simply drink a gravitation potion.