Nope, your interpretation is correct.
The Lockseed is a one way ticket to hell.

*Reads part of story*
Huh. Interesting. It all kind of makes sense now.

He's also got kind of a Redyue-esque staff weapon...

The seed gives him the ability to use all overlord weapons, also his own gun and the kiwi rings, in exchange for his life.

Huh. So like an anti-Kiwami, basically. Neat.

If this really does turn out to be an Evil Version of the Final Form of the Main Rider, I think I'm marking Micchy as the best villain Rider has ever had.

He's been mostly uninteresting in fight scenes so far which is what lets him down from me as I feel every villain should have an OH SHIT factor but the way the writers make us hate him for who he is - not for how poorly realised he is - and then to do all that work only to make us actually sympathise with him for a while.... to THEN pull the rug again and make us hate him once more. I just think he's a wonderful creation, and in a sea of one note villains or villains who are always vague and mostly absent from the series in Rider he's a revelation.

Ahh, life-sucking armor gimmicks are always fun. I wonder how long he will last.

As full of hate as he is? He'll probably last longer than Roshuo.

Man! I got to says that is The most Evil version of Kamen Rider's final form. I think Micchy become a scary threat once he use Yomotsu Lockseed on him and destroy Kouta for once and all. I think it might have big fight scene between Kouta in Kiwami Arm and Micchy in Yomotsu Heguri Arm.

I think Micchy is the most insane Kamen Rider in Neo-Heisei. More insane than Takeshi Asakura or other insane Kamen Rider.

If Gentaro AKA Fourze meet Micchy. He probably wouldn't friend with him because he too insane to be his friend.