Yes, Don, I agree, without conflicting manuscript evidence to the contrary we should not get too imaginative. It seems the thinking at the time was that, given Vat.gr.1950 itself has errors, many therefore felt more free to try to find "a more original form," in a way that would be inexcusable for the P.Hercs.
For example, as we have seen, if we compare VS10 in Vat.gr.1950 vs. the better attested Clemens Alexandrinus, Stromata, 5.138, we see very different versions:
Vat.gr.1950: Remember that, being mortal by nature and having received finite time, you ascended to considerations concerning nature as far as infinity and eternity, and you have seen 'the things that exist, the things that will exist, and the things existing before.'
Clemens Alexandrinus, Stromata, 5.138: Although Metrodorus became an Epicurean, he said these things piously: "Menestratus, remember that, having been born mortal and having received a finite life, and having ascended with your soul up until the eternity and to the infinity of circumstances, you have even seen 'the things that will exist, and the things existing before.'"
Clemens Alexandrinus, Stromata, 5.138: Μητροδώρου τε καίτοι Ἐπικουρείου γενομένου ἐνθέως ταῦτά γε εἰρηκότος: "Μέμνησο, Μενέστρατε, διότι θνητὸςφὺς καὶ λαβὼν βίον ὡρισμένον, ἀναβὰς τῇ ψυχῇ ἕως ἐπὶ τὸν αἰῶνα καὶ τὴν ἀπειρίαν τῶν πραγμάτων, κατεῖδες καὶ 'τά τ' ἐσσόμενα, πρό τ' ἔοντα.'"