I've been a fan of SR since at least 2nd ed and have owned dozens of source books over the years. Ignoring the whole AR/DR mechanic (which I actually think is OK, could be better, but OK), I'd have to say I'm overall pretty disappointed with 6th ed. I started playing a couple months ago with a group of also very experienced SR players, and here's my comments.
- Too many rules are incomplete or missing. Had a PC try to cast a spell at a vehicle, pretty basic, but there is no rule at all in the book, that I could find. That's just one example, there are many, many more.
- Anybody who says the vehicle rules are fine, tell me what happens when you apply the brakes on your car in SR6? If you follow RAW, you decelerate at the accel rate. So it takes a Ford Americar travelling a highway speed something like 36 seconds to come to a stop. Ya.. OK... that works great.
- Cutting Black source book was interesting... but where are the rules on bug spirits? Pretty much an entire source book dedicated to insect spirits and we get 1 or 2 pages that only describe a true form spirit, and it's doesn't even make sense (i.e. no materialization power). Started with my PC's before the events in Detroit and wanted to use bug spirits... had to go back to my 4th ed Magic book and make up my own rules for 6ed.
- Firing Squad: Why all the spoilers for Cutting Black events in the book? It's annoying. I wanted to give it my PCs to look at the equipment, but had to create a redacted version without all the spoilers. Why? The book would have been fine without the spoilers?
I'm going to agree with the crowd above... if you are not a SR expert (I've been on hiatus for about 10 years) and you're not willing to invest a huge amount of time in creating you own house rules to fill in the blanks, the game is just not playable (sorry dev team, it actually pains me to say that). If it weren't for my long standing love for the SR world and the fact that I have time on my hands right now (thanks COVID), I'd have given up and tried something else. Or maybe we'd have gone back to 4th ed.