I just cut the fuel tank sender hole on the drivers side the other day and finished the Quaife AWD diff swap into a 2007 02Q transmission last month. The angle drive bolts up perfectly.
It is very hard to find in the correct angle drive (or transmission) as the only 4motion manual cars to the best of my knowledge are the Golf R Mk6+ (02Q) or TT Mk1 225 (02M), the only one I could find available was at a wrecker in Quebec. I was able to build my own AWD transmission for about the same price as purchasing a AWD trans and as a bonus getting a LSD for free.
For comparisons sake I have grabbed an angle drive from a Audi A3 Quattro and while the angle drive is the same, the centre shaft for the right CV is shorter where it goes into the transmission, but it looks like I can swap the centre shaft from the manual angle drive if it decides to pack it in.
I have shifter, surround for center console, 4motion gas tank, subframe, drive shaft, CV axles, 3.6 exhaust, MK6 Golf R downpipe, rear valence, CCTA angle drive brace, turbo lines, heat shields, etc etc. From my research the passat body doesn't require modifications to the trunk pan like the golf/jetta conversions do. Everything bolts up. As for the Haldex 5 swap it will be an experiment but I do forsee success, just need to make a small harness adapter as the connector is different between the controllers and I miiight need to put in a 7N0 gateway. From the pictures I have seen they are physically compatible and it should plug right into my rear diff.
The MIB2 STD2 PQ units in the later (mine is from a 2016 CC) models do come with and can be matched with what looks like a cluster with 1000+ firmware (which I have 2016 CC color-verry hard to find), or just use the hacked firmware which is easily available nowadays directly on the unit. I haven't found conclusive proof where the master is on the passat ( or cluster) on Golf it is the cluster but I have a feeling its the same. If you search #freeforall on drive2.ru you will find a eeprom/firmware patcher for the 3AA controller to enable , newer radars, PQ cluster and other things. There is also a freely available tool to transplant the EEPROM immo data from a 3C0 to a 3AA , which hopefully will make life easier when it is time to start on that.
I have both the 10 (factory) and 12 channel (potential retrofit) amps for my factory Dynaudio so I will see which may be the better when I do the MIB2 retrofit, but I don't know if there will be much of a difference. The system does pound pretty good with the existing factory RNS510, but from what I have heard the MIB2 sounds even better.