Don't think we'd ever hear entirely how development goes. Devs don't usually go into details like that until after the game is done. There were some hurdles for sure, like the pandemic starting by the end of 2019 and making life difficult for everyone. I can imagine it was even for a team that's divided around the world and not focused in a singular workplace. As for the China thing, I wouldn't call that too big a deal. It basically boiled down to FOW picking one form of Chinese for translation, China having a fit and review bombing the game, and FOW capitulated and agreeing to do both versions of China.
Gameplay wise it is not meant to evoke XCOM vibes (people just naturally click to that because its the most well-known one), its more evocative of the Final Fantasy Tactics games (so much so that one of the older dev blogs talking about it is named Tactics Ass-Vanced, a ref to the GBA game Tactics Advance). It isn't meant to be complex, they've said as much during the early stages, the gameplay was designed to be simple, its their first game after all. Even so there's been plenty of feedback regarding difficulty. While it might seem shallow or easy to you, it may not be the case for everyone. It definitely isn't Mass Effect, which they never claimed it to be, that was articles writing about it.
Regarding Pandora, this is a bit of an oddball topic, because as much as I see comments on it, either complaining about their length (5-second gifs, like we're in the tumblr age of smut), or the content not being connected to the game, they still want to see the rest of it. Personally I knew things wouldn't go smoothly when the game launched with about 8-10 scenes for the first 3 gals and that's all we had for 7 months. It wasn't a great first impression, I knew that much. While more scenes were added up to Taron (her amount was a side effect of working on the experimental 360 scene in her mission. Which proved to be more hassle than its worth), around Sova's update they decided to change their release strategy. So each update purely focused on the new lady in question, and added a sizable amount of their scenes to start. As for why the rest hasn't been added I'd say is about the same reason why they didn't add the costumes they've been teasing for several diaries now, you gotta save for the end. Adult game or not, if they gave you every scene except for the devotion quests before the main game is complete, you wouldn't feel as inclined to replay the entire game again only for the cinematic scenes that lay buried in the game files.
That they're having the save files wiped upon 1.0's launch is a good sign that the game that comes out of early access is not liable to be the same thing we've been testing out the last few years. The progression system is changing to lessen the grind, planet missions and descriptors are being redone, as is the dating system in the bar. Coupling that with the number of costumes teased, the length of the devotion cinematics, and there still being another waifu with her own scenes to add to the rest in the future afterward, its gonna be quite the substantial update when that day comes.