"No, we should hope they were secretly Evil. 'Bad news about the past is good news about the future.' If you learn that some hidden problem obtained about the otherwise observationally fixed past, that's good news because the past's quality level is not thereby changed plus you can fix that problem and get a better future. If dath ilan was secretly Evil, beating that quality of living standard in Golarion will be much easier, because dath ilan had that quality of living despite being handicapped by being Evil."
"Your Baseline is functionally perfect in syntax and pronunciation, it's just missing vocabulary size, intonation, common phrasings and proverbs, and, if you genuinely wanted to be able to pass as indistinguishably native, making the sort of technical arguments that dath ilani would make. Vocabulary you can get off Tongues or from Share Language (Baseline) that I tap somebody with, common phrasings have to come from me and I don't have them mentally stored in a format that lets me rattle off a complete list, perfect intonation is going to require at least listening to me talking for long periods and possibly continued active correction, and argument form is full-blown being as 'Lawful' as we were. How do you want to play that?"