It's not so bad on my PC, I can run it smoothly with a view distance of around 1km. It's great to be able to view my world in such detail.
As for weather, Cutter John
, are you using the bed at night? Because someone checked the code and weather is given a random timer that usually lasts more than an in-game day and it seems that using a bed resets that timer. If you don't go to bed for a few days then the timer will eventually reach 0 and it should rain. I usually use the bed every night, so that explains why rain has been so rare for me.