Yeah, they shouldn't spin it, but that financial security would be hard to turn down.
As for on Steam, didn't PoE2 only sell over 100k or something in its first year? So its still a good deal for them
Pillars of Eternity 2? Yeah, it didn't come close to the original. Somewhat different genre than an XCOM-inspired game. I don't think Steam had much to do with it, though, it had a much--hyped Kickstarter for a return to a genre that seemed to pull in a lot of people who didn't really know what they were getting into with the RTwP cRPG subgenre. They knew doing a Baldur's Gate successor was Really Important and they knew Obsidian did the increasingly beloved New Vegas, so the hype was strong among people who were probably never going to finish the first game in the first place.
There's a similar dropoff in sales of Baldur's Gate to Baldur's Gate 2 for the Enhanced Edittions. The reputations of games in this genre seem to outpace the interest of modern gamers. In a different subgenre, it turned out not many people wanted more Dungeon Master type experiences going from Legend of Grimrock 1 to the much lower selling 2 (despite 2 being a
much better game).
My personal theory is that RTwP in the late 90's style made much more sense at the height of the popularity of RTS, but now that's more of a throwback burden that puts new audiences off your game. Hence few returning for PoE2.
Meanwhile Divinity: Original Sin 2 seems to be much more in tune with what modern audiences want out of cRPGs, to the point that PoE2 even added a turn-based system in an update recently.
With Phoenix Point, you really can't blame them seeing as how their own previous game bombed and other XCOM clones not named XCOM are failing to make much of a splash. They even have notable competition in their "we're more like the original X-Com!" niche, with the Xenonauts series. It's an uphill battle and I sincerely don't blame them for hedging their bets. I'm not sure Steam has anything to do with interest their game may or may not have garnered without this deal, though.