The ToB was certainly fun, but it was also redonkulously unbalanced. It is certainly something I'd love to tackle with the 3.5 content, but its a massive undertaking especially since the ToB mechanics most closely resembles the Path of War in Pathfinder and its not as easy as porting over the 3.5 files and editiing them a 'little bit'...
If someone else wants to help with the data entry tho, I'd be happy to put everything together, at least as far as the OLD disciplines and maneuvers go.
As far as the old classes and prestige classes, the Path of War Content is, admittedly not something I am very good at working with, creating classes, prestige classes, archetypes and even feats that grant access to specific disciplines is, kinda complicated. And with my current projects, and the fact that I'm trying to start a game or two on r20 to earn a bit of extra cash... Yeah, dont really have the time to try and get the extra stuff to function.
Now, if you had a specific set of disciplines added, I could could try and take a crack at or, even help walk you through whats needed to add them yourself, I've created four custom disciplines for a game I ran in the past, and that part isnt that difficult, just time consuming.
If you'd like to contact me, feel free to send me a PM, and I'll get you my discord info.