I must be among the minority. My 2014 mk3 pre-facelift LED headlights are superb. So much so they are brighter/better than my old HID's in my Toyota Auris.
Also the Full/main beam is brilliant. Very wide and even spread. Lights up the county lanes like dawn breaking..... All in all I have no complaints.
My experience exactly, I do wonder, did the 2013/2014 Leon have different LEDs? And after they changed / dimmed them for later years? Did yours have headlight washers with no winter pack?
On full beam, it's no contest, neither the Ibiza with Bi-Xenon or Volvo V40 with 'Thor Hammer' LED full beam can compare, the Leon was better on full beam. However I do admit that my Leon headlights were pointed too low and were adjusted up with the screws at the MOT headlight thingi...
Good to see the price of second hand units is coming down a bit so hopefully when one of them goes it wont be a very big bill.
LOL, I'm still afraid to look....