Leaving aside things that we do just because we "want" or "can", the OP questions were: 1) whether he would understand more with remote meter, and 2) "Does the remote meter provide any info on the power generated by the panels separate from the power being fed into the batteries".
As I can see it, the answer is: 1) No, he would get more data but would not "understand more" - not about anything important for system functioning; and 2) Yes, the meter would provide such an info, but this info would be of little, if any, use.
Though this 2nd question, when I look at it, falls into category of things that we do only because we want. In other words, just for fun of it. My apologies that I didn't notice this from the beginning.
Edit - PS: forgot one useful aspect of controller display. When solar side suddenly stops working for no obvious reason. Let's say, a giant prehistorical bird would fly over and shi.t over entire panel while you are away or sleeping. You look at the controller - what the heck - the sun is high but there is no panel voltage, no nothing. Then you realize - aha, must be that bird again, so you climb the ladder with a mop and give panel a good cleaning :)
