I want Soul Calibur VI to look good because it's a game that I want to have. I know game play is more prioritized than anything else, but graphics add life and beauty to the game, just as much as the soundtracks.
Soul Calibur IV looked good during its time, the sound effects are good, the game play is good despite how slow it was compared to SCI to SCIII, but the soundtracks were kinda...lifeless, which didn't add excitement when playing it.
I never played Lost Swords because that game is only on PS3 and I'm on Xbox, so I don't know. All I know about that game is that they brought back some of the old characters that weren't in SCV and the move sets were greatly improved.
The graphics do look good tho imo, I just think SC wanted to still look familiar and didn't want to do a from scratch overhaul on UE4, the only game I know of that did that was SFV. I just mean idk why people expect photorealistic graphics is all, with bigger studios that make tons of money like Warner Bros Netherrealms studios and even like FF I can see that tho. I think people expect a bit too much in some ways but I can see your concern tho. I'm just happy with the game tho, especially with how they did Sophitia's loose hair when her braid comes undone, like damn can Lili's hair move that way??
Lost Swords didn't really improve move sets tho. The game they made more beginner friendly by merging combo strings together on buttons so it was way easier to play but that wouldn't fly on an actual SC game xD Pyrrha was able to do like 4-5 hits into a launch and then like 5-6 more which was insane, and Amy was definitely OP but that was ok since the game was single player, it was basically just a hack and slash in the form of a 3D fighter tbh.
And tbh SC4 was the best SC behind SC2 and SC3 imo, it had all these characters and the visuals were amazing and I loved how Sophitia's story was done in the game, with the whole abducted children and being forced to protect Soul Edge. SC5 looked great but somewhat the same besides lighting and shading and some altered character models, I would have preferred a remake of SC3 tbh