The patch has introduced a number of nasty bugs, so maybe they have decided to hold it back, that said, those bugs seem to be related to steering wheels and as I am a luddite on a pad, they tend not to affect me.
I've driven every car in the pack, and these were my impressions.
Porsche 718 Cayman S.
A bit vanilla compared to the other cars, but that doesn't mean it's bad, once the tyres are warmed up it's a very stable, if not overly quick car to drive, you can be very consistent with it, doesn't have the immediate fun factor of the other cars, but is still nice to drive.
Porsche 911 Carrera S
This one feels odd, sure it's fast, but it handles like a tank, almost feels like a heavy AWD car, if you don't get the rear end out, you can get a TON of understeer, front end feels all bouncy too, once you get your head around how it handles, it's not a bad car, but just requires a certain driving style to get the most out of it.
Porsche 911 Carrera RSR 3.0
Beautiful car, everything about it is just right, sounds great, looks great, handles amazingly, and it just loves to slide, and it does so in such a friendly way that you can just get it to start sliding and let the car do it's thing and it won't bite your arms off, one of the highlights of the pack.
Porsche 917/30 Spyder
Lunatic!, power, power, power and more power, even with those huge rear tyres you only have to look at the throttle to get them to break traction, and when it does, it does so fast.
You really need to keep on top of this car because it doesn't have great brakes and is a bit of a beast to get round slow corners, and then POWER!!!!, if you can manage to string together two good consecutive laps, you're doing well!
Sounds are a bit muted in game, with the wind noise drowning out the engine at high speeds (which happen a lot in this car!), second highlight of the pack.
Porsche 918 Spyder
Pure rocketship, wind down the MGU recovery a little bit to tame the rear end, and put the boost on hotlap mode and watch it go!.
Unfortunately you can't turn the traction control off, so that tempers the fun somewhat, but boy is it fast, I have yet to do any laptime comparisons with the P1 or LaFerrari, but I look forward to doing so!
Porsche 935/78 Moby Dick
This car is nuts, it's very tail happy, and the turbo lag is just phenomenal, no power, no power, here comes to boost........HOLD ON!.
Tough car to drive consistently, but a heck of a lot of fun to try and tame.
Porsche Cayman GT4 Clubsport
Pure GT car, very stiff, linear power delivery, quite tame to drive, not particularly exciting to hotlap, but that's not it's forte, it excels at close pack racing, and it's quite docile when doing so.
Porsche Panamera G2 Turbo
After driving the other cars in the pack, this just feels dead to drive, very little feedback from the car, but it is really quick for a sedan.
Overall it's a great pack, well worth the asking price, some amazing, and some not so, cars!