Different engine and battery models don't cost anywhere near the additional retail prices given.
An Mercedes Benz E200d & E220d is the same engine, but different engine mapping. Same MPG and CO2 levels too, but the E220 is £2-3k dearer.
Same applies to engines from Jaguar, BMW and even Ford Transit Custom Vans.
Tesla will also be the same - whilst increased battery capacity will obviously physically cost more, it won't cost the difference in what they charge for it. That's just marketing and consumerism - it's perceived as a superior model, so folk will pay for it.
The 2019 Model was never going to be a radical change, as there's an all-new model for 2020/2021, so this was just a little stepping stone or even a test mule for the all-new one. The new one is based on a shared platform with Ren-Nis, so time will tell how it's going to marketed. It's also (the 2019 small update) for Japan and the European market only. No surprise it didn't make the US, due to the long time it took the current model to get type approval, mainly in Cal.
Also, I read on here the the Li-Ion batteries for the Outlander are Yuasa ones, who are quite new to this tech (obviously well versed in normal lead batteries). The market leaders Panasonic weren't choosen. I presume Yuasa ones were cheaper, but perhaps the actual density of them are not quite on par yet? Stats: https://www.statista.com/statistics/235323/lithium-batteries-top-manufacturers/