TurboTax Online normally displays several prior years in the list at the bottom of the Tax Home screen. If you select a return from the list to download, you can still go back to the Tax Home screen and select Your Tax Returns & Document and the same list of years should display. I was not able to replicate your description in TTO.
You can't display your personal TTO account on the Community website. The link you posted just leads to a landing page for TurboTax Online.
Please see this help article for information to view, print, or download a prior year return in TurboTax Online.
If you have a specific recommendation for an enhancement, you can submit it whenever you receive a survey from TurboTax.
