Before I start: that's no complete review (solely from the fact, that I didn't bought every set, but only 4082, 4087, 4088). So anybody is invited to expand this thread.
The THW things -- as already mentioned somewhere else -- are not new. Most things, especially the vehicles are borrowed from firerescue and construction (the trailer from the farms series and the personnel carrier from the police series), but all in new color design: THW blue and white.
Also the shepherd dog, which appears in this set also in a new color variant (dark brown; 30 65 2302), the barrels which are the well-known type variant in silver, a chain saw in new colors, and the boat trailer from
3399 in white (just to mention the obvious ones).