I don't really spend coins to downvote and I don't comment if I can't contribute anything new. However, I hope you've considered why the homepage (Global Dashboard) is the way it is. It's there for everyone, not just one person. This site is not solely meant to just dump and organize your ideas but share it with others, especially those already using the site. The homepage/Global Dashboard is there to support worldbuilders like yourself and highlight them as well as feature recent news, blogs, and other relative announcements involving the platform you're using. Anyways, my contribution: A solution in order to see everything related to your own work would be to simply customize your bookmark bar (like others have said) and just put your own personal dashboard as a direct link/button. You click that and you're on your own work with the most recent articles (5, I believe) already there. Drake also made a good suggestion where you can customize your own page. This site is flexible and you can customize pages how you'd like with a little time. As for your suggestion (for a redesign or an option to switch/toggle), I think this is pretty disrespectful to the creators and staff that work hard on the site and it would be a disservice to the majority of creators using the platform.
I have to agree with the others. Make your dashboard or the articles and Categories tab your link to WA and you should have, what you are looking for, You could also very well create your own WA page wit a to do list and have that as your WA-main link. I used to do that with "recent updates" articles were I post each day what I have done, wanted to do and so on. Quick and clean way to focus on your world and your world only. Plus, others can read along if they want.
The Dashboard is an important way to keep users of this website up to date with updates and other things going on with the platform. Removing this seems very counter productive. You already have your World Dashboard, which only includes the things you have been working on. The Global Dashboard is not meant to display your own work, but the platform and that's exactly what it does and should be doing.
This is not your homepage, this is World Anvil's homepage. Your homepage is under DASHBOARD for each of your worlds.