After reading through this thread a few times, I do agree with Dennis, we have been using TCAdmin for community purpose around 2013, then started using it for hosting around 2015 and I have been loving it since then.
I love how much you can customise TCA with the custom scripts. I've made a discord bot that links WHMCS & TCA together and allows clients to control their service with the bot, it works absolutely amazingly.
But yeah the black console window does not look appealing for end-users, but the page loading times are quite long, but it's great to hear that Luis is working on making them faster! I would personally love to jump on this train to test out the new updates surrounding this issue, i'll be regularly checking back for updates.