you still get the teir one mats just much less frequently, i have less than 50 of each cotten and less than 100 of each "scale" under leather those mats still drop but a lot more rearely than before and of course there the most desirable (for me) given what they allowd me to get on my gear
otoh I have all but one of the metals with at least 150 in and I think most of them are close to 255, last month I spent a couple of hours making dragon calls I exclusively used silks, redheart leather and paragon lustre, after making over 160 of them I still had 255 in both read heart leather and paragons lustre although the 3 silk stacks were by then in the 250>254 bracket ......a while back a tweak was added to the way drops occure and that was supposed ot give us the stuff we needed most, but I think its limit is wrong we know that the majority of things 255 is not a hard cap but a display counter cap and the hard cap is a lot higher for each stack, with potions all but health are hard capped at 255, health like the crafting mats is only soft capped at 255,I have been using health pots for weeks between buying crates and not managed to start showing that usage otoh if I use one of the others it instantly shows its dropping.