"The charge attack SUCKS. The random status effect is cool, but you can almost never hit a monster with it! Please patch it!"
I bet OOO LOVES hearing that one of their creations SUCKS. And then again, there's another Boss Award that can't be bought at HoH creating more strife for people.
Besides, that would ruin things like the Gran Faust and the Divine Avenger being the embodiement of Dark and Light, and so on.

"Have Sealed Sword have its own upgrade path."
What? :S
Yay! Another Boss Award that Basil won't let me have.

Basically, Lugu nails it with the first sentance.

"I don't think I've ever actually managed to hit something with that charge." How? Its like a DA/GF Charge except you have no magical sword.

A lot (from what I have observed) of sword users tend to rely on the "throw charge projectiles at them" tactic, often forgetting that the initial swing has decent damage. This is part of why people think Troika line is less useful than Sealed lines when in reality it relies on the opposite tactic; getting in the face of your enemies and smashing their heads down their necks. Using a sword means standing face to face with your enemy and beating the liquids out of them, not hiding like a little baby and throwing rocks. Gunning is different because it has a whole different set of tactics and complications. Swords, on the other hand, are supposed to be for direct combat. The problem with a lot of players these days is their reliance on selfish survival rather than actually fighting. For example, if you only have enough health to take one hit do you use that Leviathan or Divine Avenger charge? Divine Avenger would throw projectiles and push them back a little, but Leviathan would require you to risk getting close enough to be hit; but if you are skilled enough you should be able to either dodge the attack and/or blast them away before they can hit you. This does not mean to be careless by spamming attacks on everything you see, but it does require a combination of skill with courage. A lot of people lack both.

This is just a basic review of swords in a few brief words. I can go on for pages.

For anyone who thinks they can rebut the disagreement to this thread: Sealed is designed to have a sealed power within, meaning you have to upgrade it to unseal that power and either ascend to the light with Avenger line or fall to darkness with Faust line; metaphorically, not in terms of referencing something. In the light you gain the ability to deal more direct damage and can attack more targets, but in darkness you have the ability to deliver unforeseen attacks due to your increased swing speed and the ability to inflict potentially the most dangerous status; but the charge attack for this sword is far less favorable. The main difference between the two is the intent of how the weapon is used: Avenger for the charge, Faust for basic swings. For more on Sealed lines see my notes here along with other equipment information throughout the thread.

Go read this, this, or this.

The speed bars are, indeed, a lie. The speed is exactly the same on my Gran Faust and Divine Avenger.

Sealed is already perfectly fine as it is. The charge is not meant to be the attraction - the upgrades are. Having a separate upgrade path (neutrality instead of good and evil, possibly) might be interesting. However, the sword is already used frequently in t2 LD, and does all right even with normal damage and the current charge. It doesn't need any changes for the 3* version.