You know, I've downloaded plenty of mod compilations, and I really like them. Especially in a case like this, they bring together the best mods for a game and documentation on how to make them work together properly. Anyone who's ever downloaded more than one mod for a game knows how much of a nightmare compatibility issues can be.
As long as Tyler credited all of the original authors (which it seems he did) and didn't try to make a profit off the mod pack (which, as far as I can tell, he didn't), I don't really see a problem here. Yes, the original authors worked hard on these mods and deserve credit. However, they've been given credit, and the idea of fanmade mods is that they be freely distributed throughout the community. As far as I'm concerned, the people fighting Tyler are getting pissy that they're not getting recognition that they wouldn't have gotten anyway. Seriously, how many of us have taken the time to email the creators of every mod we've ever used to thank them for their hard work?