% qlist plymouth | fgrep .la /usr/libply-splash-core.la /usr/lib64/plymouth/space-flares.la /usr/lib64/plymouth/throbgress.la /usr/lib64/plymouth/text.la /usr/lib64/plymouth/label.la /usr/lib64/plymouth/fade-throbber.la /usr/lib64/plymouth/renderers/drm.la /usr/lib64/plymouth/renderers/x11.la /usr/lib64/plymouth/renderers/frame-buffer.la /usr/lib64/plymouth/two-step.la /usr/lib64/plymouth/script.la /usr/lib64/plymouth/details.la /usr/lib64/libply-splash-graphics.la /usr/lib64/libply-boot-client.la /usr/libply.la /usr/libply-splash-core.la and /usr/libply.la are particularly strange. Anyway it seems that most (all?) of them could be removed since the package doesn't install any static archives.
Fixed with plymouth-0.8.3-r1. Thank you for the report.