As much as Howard paid the price for Jimmy and Kim's spite, it also sticks in my craw that they used a decent dude like Clifford Main in this way. It's somewhat ironic, because his particular area of specialty, mesothelioma lawyering, is a genuine cesspool.
Also they really don't seem to be being very subtle about the foreshadowing, something I'm not sure whether I like or not. "Plan and EXECUTION" was pretty on the nose. So is it a foregone conclusion that Lalo dies in the lab? It also seems to be a common speculation that he's actually buried there, too. This is before the days Heisenberg introduced them to the wonders of hydrofluoric acid.
PROTIP: hydrofluoric acid is an insanely dangerous choice for this kind of disposal anyway, as even the slightest contact with it can be fatal. Use boiling lye instead.