The article's claim is that in this instance, the sparseness of info made the plain "oh, Tekken 7 is coming" information less impressive than if it had been revealed with the announcement trailer like originally intended. It's more of a case-based reaction than a generalization.
The article isn't hating on Tekken - but the leak for killing the excitement.
I tried putting this on reddit's fighting game subreddits and got downvoted like crazy.
If submitted as opinion, it's subjective by nature, so I'd say it's inaccurate that there was any claim of fact here. The author wishes there'd been more excitement from early reports, that's all. The leak meant that a lot of the discussion was more focused on the leak itself rather than the game.