Generally, yes. But not many bassists, like Myung, will sometimes double the lead. I thought I read/heard that MP used to follow JP more than the bass and JM followed JR more. I could be imagining it but I'm pretty sure that was said at some point. Obviously it's not MP anymore but it's something to think about.
Yeah, that wouldn't surprise me. Again, to me, it makes perfect sense. Having your own personal mix how you want it onstage is such an individual thing. The more I think about it, the more it makes sense to me that a lot of drummers would want the bass pretty low in their own mix. As a singer who drums a little, I think about my own, and how different they would be in each of those roles. As a singer, I want primarily guitar and vocals. If I can't hear what the primary instrument, the guitar is doing, I can't necessarily tell where we are in the song and can't tell if I am in key. I also need to hear myself clearly so I know if I am in key and so that I don't unconsciously push too hard by thinking I am low in the mix, and thereby tiring my voice out. Drums come next, but lower in the mix. As a drummer, I want the lead instruments front and center. I am laying down the beat, so they mostly follow me. But I need to know when and how to accent in order to drive the songs, and I can't do that unless I can hear the leads. Hearing the bass too high in the mix is not only unnecessary, but would be detrimental if it interferes with me more easily picking out the leads. Again, others may feel differently, but that's my preference.