Best faces ever

Creating a new font is a major investment in time. New fonts do not "keep coming up". The projects you pointed to actually took many years before they reached the point when you started noticing them. And they're far from finished - DejaVu is still churning new enhanced completed releases every other month and unlikely to stop before years. So the people involved are not going to have the time to work on other fonts in the near future.

If you want new fonts the font-producing community needs to grow and the supporting (legal, software) environment improve to reduce inefficiencies. Also, regular and reliable font production would probably require companies and organisations that rely on libre/open fonts to sponsor (=pay) people to work on them full time all year round. None of the major libre/open software you use is created fully by unpaid hobbyists and the same considerations apply to major digital works like fonts.