Several people reported “out of the box” problems with high-tech engines.
Mine are a bit more low-tech.
This year I bought a bunch of Lionel 3 rail tubular track to make an extension to my layout. After putting them in place, I found one of them was shorted. It took a lot of time to isolate which one was at fault.
In the future, we should do a simple continuity test on the tracks before placing them on the layout.
The repair was simple enough, easier than packing it up to return it, but if they had any quality control at all, it would have been found at the factory.
It would only add a few seconds of time to check each one.
Second problem was with the on/off switch for a new #364 Log Loader. I was very pleased to hear that this log loader was still being made. They did however redesign the switch. Apparently for lower cost. The assembler failed to properly swage an internal connection. It is not designed to be taken apart, as the older switch was, but I did get it apart, with some damage. I could not fix it. If I soldered the connection, the thermoplastic case would melt. The old switch was thermoset (Bakelite?) plastic, which could stand the heat.
By some odd combination of circumstances, I still have the 50+ year old switch.
The new management at Lionel is apparently trying to reduce costs at all cost.
Personally, I would prefer to spend a few pennies more for better quality.