been playing this a little and it's quite enjoyable but the lack of quick-saving is a real problem, you can't experiment at all, and you end up doing the same boring stuff dozens of times trying to figure out the best way to approach something.
the costume/disguise stuff isn't a big deal and actually works pretty well in my opinion - the biggest issue is the instinct, it doesn't seem to work sometimes (when trying to blend in), and you end up in the 2spooky mode and suddenly everybody is hostile and the SWAT are on their way. but maybe i just need to practice a little bit more...
glacier 2 is an interesting engine, i have everything maxed out and it doesn't look OMG JAW DROPPING, but everything is quite high-res, and there's some nice attention to detail, but there's a few things like the lens flares that simply look ridiculous when you can't see 47's head because of the giant flares bouncing off his bald dome.
overall though it's enjoyable, nice to look at, feels very free and open without being completely ridiculous and confusing, the crowds are great, the visuals are actually AAA, the engine runs smoothly and there's no annoying bugs or awkward UI annoyances. It's very polished, very good. So far I've played a couple of hours and can't give it a "score" but it's definitely leaning towards a 90+
Good work IO!