When I took my GK Pro to my luthier for a set-up, the 1st thing he stated was; "this is lightly built, make sure you humidify it!".
My personal opinion is that quite a bit of the issues such as cracks and sharp fret ends are stemming from improper care by MF & GC.
We've all seen how poorly GC treats most of their guitars that are in the stores. At best, they use a humidifier in their "acoustic room". But the stores near me have the classical guitars displayed near the entrance door to the acoustic area next to the beginner type guitars. which exposes them to constant drafty air.
I would bet that their warehouses aren't properly humidity controlled. Then add in shipping these guitars via UPS in their trucks across the country.
It's a recipe for cracks and shrinking fret boards.
FWIW-- GC and MF are essentially the same company. I've purchased items from GC via the website and they've arrived in MF boxes.
I had the fret issues on my C5 and C9. The luthier filed them all by hand under the warranty. I had a C1 Protege that didn't have the fret issue. All three of those guitars had cracks in the fingerboard, two of them came that way from Musicians Friend/Guit Cntr wharehouse in Kansas City. The only Córdoba I have left is the C9. After such bad luck with them, I won't buy another Córdoba. I was on the fence about getting a Córdoba Hauser model, but now I'm definitely not going to. I've read too many posts about people's guitars developing cracks. And the fret ends sticking out is common on half of their production it seems. Are they getting stored in hot, low humidity environments in the wharehouse?