IM is a lengthy game that pits Indy in various situations. The mentioned mine car secquence is just one passing secquence and, unlike ToD, there's never any real feeling of chase or urgency with it. You can stop the thing at will, and walk around and explore and take your time. Same applies with all the vehicular segments in the game. They're more like transportation devices.
And, as said, there's plenty of things in a game as lengthy as IM that echoes from the movies. There's plenty of boulders to run from, there's betrayal of a supposedly friendly character like in LC, it's even got its own echoes of FoA. And none of this is a bad thing, because they really don't contradict anything we've seen earlier. I don't quite get where one got an idea that we'd gripe about ET because it rehashes things. It's purely those plot inconsistencies why at least I have trouble considering it as a canon piece.
ET is a great, fun game and I experienced loads of good moments playing it. I somehow think why it fails is that it's clearly attaching itself to ToD, attempting to be a direct prequel to it. And since someone did sloppy work with the plot, it breaks the image of the flow of things we've been having from the movies, becoming a forced entry. FoA and IM are individual adventures. They do have a time stamp, yes, but apart from that they make no attempt whatsoever to connect themselves to the any of the movies or shed more light to things that happened in them. That's why some people consider them superior chapters compared to ET purely on story level.