How does the power company implead Owen equipment? Well maybe they rented an unsafe crane in some way.
14(a)(3) allows Kroger to assert claims against Owen Equipment once they get impleaded.
Then Owen waits till the statute of limitations runs before it announces it's from Iowa, thereby destroying jurisdiction.
So Kroger's best strategy was not to make a claim against Owen, get a judgment against the power company (and therefore also Owen because they're impleaded). Then she can bring her claim against Owen elsewhere, and use issue preclusion.
Note that in WI we don't say "abuse of discretion," we say "erroneous exercise of discretion." Also note that you can cite to unpublished opinions in WI sometimes, but not per curiam decisions.
Still, most plaintiffs would join. But we let parties control the structure of their suits: Rule 19 does not require the most efficient disposal of lawsuits.
But this is arguably deciding on the merits, and not just the joinder rules. The court does this to Valley West because it thinks they have brought this trouble on themselves-- but that's not a factor to be weighed at joinder time.