Also, some decisions are made not because of linguistic reasons, but because of political ones.
Just an example: "Craiova" is read "Krajova" or "Kraiova", but "ce face" is read "t͡ʃe fat͡ʃe".
C followed by E or by I isn't read C (K) anymore, but rather like English CH in Charlie. Same goes for G followed by E or by I - it is like G in Georgia, not like G in Bulgaria.
It is in the nature of the language.
I see that you know Cyrillic script, so I'll use some Cyrillic transcription.
E.g. singular (un) Drac (a devil), transcribed to Cyrillic - Драк. The plural is built by adding an "I" at the end of the word - Draci (devils). Transcribed to Cyrillic - Драчи.
Back to your example with "ce face" (what is he doing): Ieu fac, noi facem (I do, we do) - transcribed to Cyrillic - Иеу фак, нои фачем.
Same for G - (un) Drag (a loved one) is with G like in Bulgaria, but the plural Dragi (loved ones) goes to G like in Georgia.
So, in Craiova, C is followed by R, and you can read it like K, but in "ce face" you have two CE groups, and here happens the transformation. In standard Romanian, the letter H is used to break the transformation, like in word Cheie (a key). H isn't a vowel here, but is just used in script to depart E from C, so that the transformation does not happen.
As for Romanian and Cyrillic script - yes, the church used it because of the influence of Russian/Ukrainian church, from where the religion came to Romania. The liturgy in churches were in Church-Slavic til 18th century. There wasn't a lot of literacy outside the churches. But, do not imagine Romanian Cyrillic script to be anything like modern Bulgarian, Russian or Serbian script, as it was derived from Church-Slavic Cyrillic script (
https://ro.wikipedia.org/wiki/Alfabetul_limbii_rom%C3%A2ne#/media/Fi%C8%99ier:Romanian_Cyrillic_-_Lord's_Prayer_text.svg ). It contains letters like șt, în, ia, ie or ou - one letter for group of vowels.
Latin alphabet for Romanian language is established in 1860.
In Bucharest, in National Museum, you can also find tombstones written in Romanian, by using Greek alphabet.