I do not argue with this, I completely agree that SpellBlade should solve his tasks with the help of swords. But this is the problem.
Maybe when time goes by we get additional sword base types that are suitable for Spellblade besides the 2 current choices.
Take a look at this list.
Sword: Katana
Axe: Eagle Wing
Blunt: Solarum Hammer, Doom Star, Rune Hammer
Dagger: Rune Dagger, Moon Dagger
Sceptre: Argentus Sceptre, Obsidian Sceptre
Among all these weapons that could potentially be used, there is only one sword, the katana, and then, it is only suitable because of one single node (of all SpellBlade skills), which gives a critical attack.
Or take for example the Scimitar, which logically should be suitable for SpellBlade instead of Argent Scepter, but not suitable, because SpellBlade does not have abilities that are enhanced by swords.
As a result, even with suitable swords, we use scepitres. Or with daggers or clubs …
As a result, for SpellBlade you need to create crutches, like Crystal Sword, for its mechanics to work …
In my opinion, SpellBlade should be such that by taking a Scimitar in hand, it becomes useful and effective for us. Or taking the Dawn Blade into our hands, he turned out to be more effective for us than, for example, the Obsidian Scepter.
P.S. Tell me, is Spellblade for you a magician or a warrior?
If you give a war to the hands of a sword with fire damage, he will turn into a melee mage?
If I would ever create a Spellblade in a game, it would be a Kung Fu Fighter with all kind of melee weapon skills. Magic would be used for defensive purposes, movement and buffs.
I remember the D&D games.
Take Paladin for example. He imposes buffs on himself, increases defense, attack, and so on, even a sword can make him burn (if I didn’t mix it up). But does that make him a melee mage?