That game has a horrible graphics filter applied to it that affects colors, imparts a fair amount of blur, and even adversely affects performance. It's a bit like the filter Tango Studios used on The Evil Within. Fortunately there's an excellent mod to remove the effect by someone whom goes by the name NyClix. There's also commands that can be used to remove the filter in TEW as well if you happen to play that game.
The video below shows where to get the NyClix mod and how to install it. Unfortunately, in my experience, the latest updates of the game present an even worse problem, being more artifacting throughout the game. It's not caused by the mod either, because some artifacting was there before the mod was even made.
Mafia 3 ended up being a love/hate affair for me. It's a great game in concept, but Hangar 13 did a horrible job on the technical end. I'd go as far to say it affected Hangar 13's reputation so badly, they may never recover from it. And that's coming from someone whom thoroughly enjoyed the game until the final patches made it much worse.
As far as your spec goes, you're right in between Minimum and Recommended spec with the 1050 Ti (which amazingly is only 1% slower than the desktop version), but closer to Min spec (roughly 40% away from Minimum, 70% away from Recommended) . The CPU is about equal to the recommended i7-3770 in speed. Thus you may have to be careful with some settings, even WITH the mod, which I found boosts performance slightly. My guess is setting a few of the more resource hungry settings to Med vs High should be about right if you want to maintain 60 FPS.