There have only been almost 2000 downloads of that addon. That's all.
Let's add that Guiltar was there when XenForo had problems and when many have left. He created, alone & for free, a tool that became a reference and certainly has drained some traffic here.
Let's also add this addon has been used for more than 1 year here, so I really don't see how a developer could be retroactively blamed for a syntax that didn't exist before and why users should suffer of such a decision.
I was really happy to learn than XenForo developers had the idea to create a template modification system "before" TMS existed, even if I still don't see why it was more important to mention this than to have the courtesy to mention the name of the addon developer instead of only the name of his addon. Of course many will tell me it's a detail, sorry but I don't think so. May be a cultural difference then, who knows.
When a potential customer arrives here and asks for a discount if he translates XenForo, he's been replied that the product is a bargain (which is true), that the community is really dynamic and contributes a lot. You can't smile at customers saying "oh look at our community of developers how dynamic it is" and act like this. It's rude and, even more serious, it is technically a problem to maintain the addon compatibility between XenForo addon versions. And why is this technically a problem? Only for a xml syntax! Come on, why was it so important to use exactly the same syntax?
Now I've almost no illusion that this thread will change anything, but there's a problem here.