I was concentrating specifically on the effect on the house since in a previous thread I had a long back and forth about how the house of representatives wasn’t really biased, and that increasing its size would have a minimal effect on its fairness. So I compulsively try to fight ignorance about this oft repeated line of thinking. As such I didn’t recognize that increasing the house size would mean that it would make up a larger proportion if the EC relative to a fixed Senate, helping to reduce the small state bias at about half the proportion of the house size increase.
How much to increase it is of course open to question. There is nothing particularly magical about the Wyoming rule. More is better from the EC point of view, but if you make it too large it becomes unwieldy (can you imagine a house of 2000 members with the equivalent of 5 Gaetzs, 5 Boeberts and 5 MTGs all screaming for attention).