I switched to nxt a few years ago. Even without updated drivers it runs better for me then Java. Jagex isn't the only one removing Java. When billions of people got hacked with Java everyone wants to get rid of it.
^ Did you go to settings and turn off loading screens? That's the first thing you should do. You can turn off all the particles and stuff in settings too. But choose what settings are best for you. Sometimes you may experience slow loading items in bank and slowly loading after teleporting but other then that you should be fine. No loading screens is great to have.