Ok, I can see what you are saying. A couple of things come to mind in regard to that:
1. Their rank isn't affected. They are still awarded the rank in the order they beat the event. The only difference is the asterisk, to show that a significant chunk of the raid force was not tagged with the guild claiming the win.
2. There's a 10% allowance. As long as 90%+ of the raid force is tagged with the guild claiming the win, they are not required to submit as a joint effort, and thus do not get the asterisk.
It's my understanding that the whole reason guilds are working together on these events is because they are not able to complete the events alone. I don't think the asterisk will change that in any way.
To be fair, I am no longer on the Rathe server, and don't keep up too much with the raid scene there. If there is something I'm not aware of that should be discussed, please feel free to bring it up here. If you're not comfortable discussing it here, I can be reached at firstname.lastname@example.org
or in game (;t cazic.rorcex).