in depth chain analysis is incredible (timing, dust, kyc). if made with foss ethos and a great ui/ux is definitely a great thing to have in your tool kit. i remember using otx and kycp just for the experience of it. it was a great way to learn more about the ways bitcoin works.
Definitely plan on it being open source. Might just add it to my current project Live Wallet (https://livewallet.space/#/) . Having access to oxt and kycp apps and codebases right now would be really helpful, but I haven't been able to track them down since the feds went after samurai.