Half ass comp is worse than no comp. All it does is provide an even sketchier framework for people to abuse.
I think there's a distinction to be made here (you may not agree) between comp meant to "nerf" certain builds or armies and comp simply meant to make you
take more interesting armies.I don't think 3 Riptides or 4 or 5 even with the special character is by any means the most powerful Tau army -- I do fine with just 1 myself and I think it's a little nuts to take more than 2. But I also really don't want to fight a 3 Riptide list, or 3 helldrakes, LRs, Wraith Knights or whatever else. I just don't think that's fun.
I'm not in favor of comp, generally, but this seems much more geared towards making you take an interesting list than nerfing certain builds, and while it's not how I'd do things, I really don't mind it.