Whenever a single Guild task is completed it currently tells you that you completed it in the mail.
Eg. (your name here) has completed a guild task (Red Statue). Here is your reward!
Would it be possible to name the top three donators when a task is finished? It would make donations more of a competition and give kudos to those that deserve it.
While more information would definitely be useful, it would be easier and faster for the devs to make the message say:
[Guild name] has completed a guild task (Red Statue). Here is your reward!
They could probably implement this fix very quickly, but I hate to see the devs spending any significant time on such a minor cosmetic issue when guild wars needs updating.
Then you would also have to way in the level of guild task, completing the 5k one is not so much impressive compared to completing a legendary one by yourself.
Although I do like the idea, I think it would be to much work…
I would go with Papa’s suggestion, and just say “[Guildname] has completed a guild task, etc”