I believe the trailer has somewhat the same mechanism as 42098's ramp mechanism. Not entirely sure though.
The truck looks OK imo, but it seems to me the cab won't be openable, which is a big missed opportunity. Trailer wheels and gooseneck look weird to me, I feel like the gooseneck should go longer. Same goes for the ramps. It would be better to have the ramps fold in half, like 42098 has.
Excavator looks really cool, not much to say about that.