All in all I think its a good improvement. The Effects lock up bug being the biggy that needs fixing ASAP.
Some of the good things. Vne has been tweaked to more realistic values. BF109 is good for 730Kmh + before it starts getting lively. BF110 snaking starts around 650Kmh. Sound cueing for high speed is better. This is going to enhance the flight envelopes dramatically. I haven't tested any other aircraft yet.
Stall Buffet is enhanced and is even better.
Auto prop pitch is working exceptionally well and easily keeps up with IAS/TAS changes.
BF109 Rads work just fine as long as you Toggle them to manual (R key). The Default Eng rad position is fully open. Once the R key is pressed they work just as before.
RAF Serial numbers are now back to being Black with Sqn codes grey.
Unfortunately the Sand blockage in the river near Le Havre is still there (I havent checked the Thames blockage yet).
Terrain colours ... not to bad personally I think I preferred the first Beta. Same goes for the cockpit colours.
BF109,Spit.Hurricane no longer have pneumatic sounds for gear selection ... which is correct as they were Hydraulic.
And for those in West Sussex Horsham is now on the Map
So its not all gloom and doom imo, showstopper is the Effects lock up.