While I don't disagree with you (I hate fancy pants websites as much as the next nerd that just wants a plain text list of things), I'd note two things:
1) There's a 'grid view' option at the top right of the list of projects that provides a simple interface to view the list. It's still not as good as a simple table list but it's better than the weird mess that you get by default.
2) I have to wonder if part of the reason for this is to intentionally make it the sort of flashy shit that appeals to less nerdy more mainstream types (CxOs who want to see pretty colours and animations). Open source still has a reputation as ugly, scruffy, immature, etc (we can argue about whether that is deserved or not all day), and this approach makes it a little more slick.
Perfectly willing to agree this is annoying. I want a table list. But if it helps people take a look at open source with fresh new eyes maybe it isn't all bad?