Fastest rename, review, sharpness check technics

Hey there, 

I just started to just Bridge after years of being frustrated with Lightroom's speed (or lack thereof). 
I really like how preview and Camera Raw load images (almost) instantly and I am impressed by the fact that camera raw zooms to 100 % in no time. Trying that with Lr takes a couple of seconds to really load the image (on a good day). 
But there are quiet a few things I'm not so keen on. 

1. Zooming in in Camera Raw "selects" the picture, so I cannot skip through them with the arrow keys anymore, unless I reselect the picture in the filmstrip or press ctrl+arrow. Not a biggie, but foces me to jump between mouse an keyboard with my right hand and slows things down.

2. Zooming in the "full screen preview" in Br takes as long as in Lr. Why is Camera Raw so much quicker? 
Is there a way to review pictures and control sharpness at the same time? Review mode has the rather useful magnifying glass I know from C1, where I liked working with it, but only displays the whole picture really small (no option to fill the frame).

Also, why are the renaming options during import so limited compared to batch renaming after? I cannot keep the original file number while changing the rest with the "import from camera" window. 

I tried finding tutorials that show a different way, but didn't find anything that helped me. 

Thanks a lot!
Tan