First of all, relax. I didn't think I needed to list off the qualifications of an RPG to you just for the sake of discussion. I apparently did because I guess what I said is completely lost on you. Sorry. Keep those 6 f-bombs to yourself they're wasted on me. The immersion is probably damaged by the voice acting and animation. There's one f bomb. The roleplaying elements seem present. The writing itself for the whole story, you could speak for it more than I, but I think the premise of the story and the ships going missing is interesting. That's the second f bomb. The world building, again, I can't speak for it, but from what I've seen the physical environments look really really nice. If you mean worldbuilding as a grander concept, then I think the world has been build for mass effect properly through the first three games, so there's 3 f bombs you wasted on me for some reason. Good design isn't really very specific, unless you mean just design of the environments, but I don't know how that's exclusive to rpgs. Matter of fact neither is good writing. Or world building. I'll give the roleplaying bit.

TLDR(kinda) don't list off elements of a video game at me. I know what they are. Also you listed off ones that aren't exclusively rpg elements so I don't really know what you were doing there