I've honestly never really noticed grass deterioration until someone brought it up. I also think I noticed when I wanted to put down paths and the spots in front of my house were deteriorated. Even then I didn't really care and I think it just grows back sometimes if you don't worry about it so much.
I don't really know how I feel about it. I kind of have OCD about it and whenever I see a patch of it it makes me feel uncomfortable D:. Although I'm teaching myself to just deal with it and it doesn't really matter!
Well, for my opinion, grass determination is not really that bad, because you don't really need to put custom paths that will take soo long to put on the ground and repeats over over! If u can see what i'm saying, reply back!
I don't mind it. Though I definitely didn't like the deterioration rate in CF, NL is much better. I don't have paths at all in either of my towns, and I run practically everywhere unless visiting someone else's town.
I can see why people don't like the way the grass deteriorates, but I personally prefer the touch of realism it gives. In real life if you walk back and forth over the same grass in your backyard every day, it won't take 3 weeks for the wear to begin to show lol!
I like the concept but feel the implementation could be better. New Leaf is a step in the right direction but there should be direct control over it. At the very least an option to switch it on and off.