Stacking by exposure number?

I know this has been mentioned before, but it's worth posting again, I think. I'd love to see a stacking feature where you can simply set the number of exposures to be stacked. Coming from Corel's much infereior software which DOES have this feature, I was surprised to not find it in Lightroom!

I've got HDR sequences of 5, taken from both my Panasonic GH4 and my Mavic 2, comprised of natural light interior and exterior shots with widely varying exposure times, and it would be so convenient to autostack the whole bunch at once by exposure number. 

Even just stacking batches from one camera or the other would be greatly improved by this simple addition. It's such a simple thing, and yet would be so powerful - and appreciated!