Here's a wet race in Career mode at Misano. Other than the track looking wet the conditions don't seem to impact the player truck much, there is no rain as such (from what I've seen so far) despite the game having working wipers.
The Career AI trucks at the professional level are to slow, I super pole qualified first with a 2.12 lap and the fastest AI truck running 2.18, in the qualifying order race I just disappeared into the distance. I think most people here would find the same issue, these are not difficult laptimes to achieve.
Luckily the career mode mixes things up with 2 reverse grid races per weekend, as shown in the video I started 8th in this race and had to fight my way through the pack. The racing itself is good enough, the AI make mistakes and attempt to recover, they fight for position but there is no outright ramming as in some games. The penalty system with penalty posts and track cutting work well (i finish 2nd in this race because I was rightly given a 3-second penalty for leaving the track after the 2nd to last corner - it was worth the last corner effort but the game caught me!
There is also a bug where FFB is lost after a drive-through penalty when control is returned to the player the FFB is light in the middles of the wheel and heavy only at the extreme end of the rotation. A game pause and wheel reset cleared the issue.
The career elements such as earning money, prestige and team morale all look good but are not fully implemented in the first season (weekend to weekend contract) so I haven't seen the truck upgrading system in action yet. However, unless there is a higher AI difficulty to unlock upgrading the truck isn't going to mean much.
it's definitely a niche game and I absolutely agree it too expensive at full price on PC and consoles, there isn't enough content to justify a full-price game. However, it's available for less than half price already in some places and at £20 there is enough difference to make it worth a look.
