I can't say "much more enjoyable". It would mean that both solutions - default nub and PSP stick - are enjoyable to an extent. But only the PSP stick is enjoyable, the other solution was not even usable. My nail would hit the hinge before being on the stick, then when on it by pure chance, I wouldn't be able to tilt it in the exact direction I wanted to or not fast enough due to having problems positioning myself on that stupid thing smaller than the Y button. Now with the PSP stick, I can put my finger lower so I don't hit the hing and still push or tilt in any direction.
Now, that's just me, maybe you don't have long nails for example, so if you already find the nub enjoyable, maybe this mod isn't for you. I'm not saying you'll find it worse but just that if it ain't broke don't fix it.