Tick box for variations asking if prices, stock, SKU differ

This would be so useful so variations are only generated when needed amking user experience a lot better. A lot of our sellers don't use SKU or stock, they just tick unlimited. We have one seller who offers 5 sizes and 48 colours of a product and it generates 240 variation causing web page to nearly crash. The price only differs on sizes so if there were these options to tick for variants then they could just tick 'prices differ' on sizes and only 5 variants would appear.