On the whole, in my opinon Sailfish is pretty good package for an os labeled as beta, much more mature OS releases (well, releases not claimed as beta by the said companies at least) by much larger companies suffer just as many problems and critical bugs
Judging on the shear number of reported bugs and missing features, I would think Jolla needs half a year to fix the OS, then release a true "beta" version next summer and test that for a couple of months, and have a stable "1.0" release next autumn.