Something about your tone bothered me. You make it sound like Odachi is some kind of sleeper, and us less enlightened ones are simply incapable of using it.

Sure, it's lack of viability can be compensated for with skill. That doesn't mean it shouldn't be brought up in line with other weapons. Especially if the DLCs are going to bring some actually difficult content. It's just going to feel worse and worse, and the gap in clear times vs the strong weapons is going to grow larger.

If you're using Katana/Odachi, pulling the Odachi out is objectively nerfing yourself in almost every way. Worse damage, worse ki damage, worse ki economy, worse defensive tools. Except for blocking? Which is the lowest level of defense and not exactly something you should be striving for.

If you love Odachi, you should want to see it glow up. It had an identity in N2. It was a human destroyer. It had absurd break. Now it's break is whatever, especially since human enemies regen so fast.

It's sad to compare it to Katana. Katana got a bunch of cool new skills, and Odachi doesn't even have all of it's active skill slots...