Thanks for the suggestion, cccmar and dejan. I have a couple of videos with WIP footage of the translation on my youtube channel.
Doesn't really get the word out, though. Where would I even post the video? Here? The people here already know about the project. I tried posting on reddit once (about my footage of the sequel to Soul Hackers), but some of the people there chewed me out for trying to "get hits and make money" by inviting people to check out my translation (even though my Youtube channel is unverified, and thus unmonetized; I'd never give youtube my bank account information). I sorta gave up on reddit after that experience. I also do not have a twitter account, or a facebook account, or whatever people are using these days.
I only have 148 subscribers at the moment, so I'm largely playing to an empty crowd. Even my complete translation for the sequel to Soul Hackers and my Persona 2 Tsumi: Lost Memories footage have gone ignored. I thought THOSE would be popular at least, given how big Megami Tensei is these days, but there really are only a few people watching.
Maybe it's because everyone wants direct-feed, high quality footage, and I'm not equipped to provide that. I can only film with a digital camera. (For some reason, I can't capture video directly from my computer, so I have to use an off-screen camera. I think people get turned off by the poor quality of my videos and ignore them.) On top of that, I have no trailer or image editing skills, and can't make all of those fancy banners and so-on that people make to attract viewers.
The thing is, that sort of thing's not fun for me. The fun is in playing, translating, and sharing my work with others. Making trailers, trying to spread the word... That part's worse than translating system text! The videos that I have were flat-out BORING to make, and I think the boredom comes through in the videos themselves.
That said, my old Tengai Makyou Zero intro footage is my most watched video, with about 1,800 views since July of last year. (Over half of those views are from Brazil!)
https://www.youtube.com/watch?v=I0MTxz8pXzsIn any case, I don't expect it will develop even HALF of the following of EVO: The Theory of Evolution.
EVO: The Theory of Evolution is a prequel to a relatively well-known SNES era action RPG. EVO has a cult following in English already. (Well deserved, too! The game was a blast!) Tengai Makyou has pretty much ZERO English following in comparison. Only people into really obscure games have heard about it, and only a small portion of those people are actually interested in playing a patch. For many of them, I suppose it will just be a... "Huh... So they released a patch for it..." kind of reaction. It means just about as much to them as... I don't know, Idea no Hi, or GD Leen, or whatever other obscure untranslated Japanese SFC RPGs are out there.
But the patch will be there for those select few who really know their games.

The light at the end of the tunnel is that one big Youtuber (one of my favorites), Happy Console Gamer, is a big fan of the Tengai Makyou series, and he came across my video somehow. He left a nice comment. It's possible that he could spread the message about the patch when it comes out, but who knows? That's entirely up to him.
And King Mike, you're right. I believe "Same Game" (that looks so weird, in English) had an upgrade slot that could be outfitted to add Tengai Makyou content, or something. I think that still counts, if only slightly. It's SOMETHING, anyway.
The rom is expanded, yes... Actually, I believe Lost Templar had already expanded the rom before byuu even committed to it, because the rom I was working with had already been expanded, before DDStranslation and DougRPG started hacking into it. Maybe that's why it needs an xml?