Pen accuracy uniformity has always been one of the bigger issues with the RM2 in comparison to its e-ink competitors. It's beyond annoying to pick up the pen to dot an "i" and see the dot appear a mm away from the rest of the letter, especially if you're writing along the right edge of the device. This is probably one of the motivations why they're ditching EMR pens in this new device.
Mine actually usually has okay uniformity everywhere except about an inch from the right edge (particularly 1/3rd of the way from the top) and the magnet trick doesn't fix it for me there.
If the new pens fix the issue, that alone is worth an upgrade, but I think it's too late for me. 1 RM Pro vs a nice notebook, pencil, eraser, lead, and iPad Air for about the same cost is just... not happening. I'm not falling for it again.