So Peridot didn’t turn out to be the biggest, baddest Gem we’d ever see—in fact she turned out to be great and lovable! That doesn’t make her reveal any less amazing.
Looking back on Warp Tour with the benefit of knowledge gained in later episodes we know why the homeworld was finally returning to Earth after so long. At the moment though? With no information? That’s quite a bomb to drop in the series.
Now Peridot is small and living in a barn with Lapis. (Jasper next? Maybe? Please?)