I know Fenix lights over the last 3 generations, which means that I have a P2D-CE, had an L1D-Q5 and an L2D-Q5 and currently have all PD and LD models.
My feeling is that the quality gets better with every generation. None of my actual models ever made a single problem. The anodization seems better too, the black has become "blacker", threads seem better, the lens looks clearer.
My P2D-CE has a weird behavior. If you use it on normal modes, push the head down so that it switches on turbo, it sometimes gets dark releasing the head. Switching it on and off makes it work again. I haven't seen that behavior in normal use of turbo so (tightening the head, loosen it to switch back). It once fell from waist height on tarmac, the anodization fell off on 2 places (1mm).
As I usually take care of my things, none of my other lights ever fell, so I can't tell about them.
As for "Made In China" I agree that it doesn't say anything about the quality anymore. I would even go further : Products, which are proudly marked "Made In China" and where the producer actually is a chineese firm, the quality is a often better than on european or american products, where you don't find the "Made In China" but have to check the barcode to find out that it actually is made in China...
The chineese are quick learners, as they don't mind copying from those who have the knowledge (Please notice that I didn't say now that any flashlight company copied anything from whoever!!!). What's more, they quickly understood that the typical american and european customer wants quality, as he is used to it. The rest is shown by the price. You get chineese lights for 5$ or less, but no Fenix!
Greets,
Henk