We seem to have very quickly reached a point where the question of whether or not shove is wildly overpowered hinges on experiences I have not had that seem implausible based on experiences I have had. If anybody does have video of their PC getting shoved 30+ feet, that seems like a problem. You probably shouldn't be able to push people more than 5 feet over flat ground. That has been my experience. When you are near a ledge, the game seems to give you a little extra boost so that you will go over the ledge, but I have not seen this happen from the middle of a platform as wide as the one where you fight Nere.
But I am having kind of a hard time just accepting this as an assertion. Generally speaking, I am skeptical of arguments that take the form of "This one time this really crazy thing happened, and you just have to take my word for it, and also you're a dick if you don't believe it, but we should definitely take action based on it."
I don't record my games as a habit. But I have had my characters pushed both once and by two separate enemies (one pushed most of the way and then the next turn another pushed Wyll into the lava. I've had Lae'zel OS into lava. Even after positioning them over by the camp or whatever you would call that area where most of the crates are located. That requires meta-knowledge to do that to even know, in the turn based system, that could have 2-4 of the dwarves go before you even get in a potion. Had a GNOME push my 18 dex ranger into the lava. I wish I could say my experience was your experience. I'd still be playing. It got so ridiculous I just uninstalled the game and will likely wait another year before returning to see if it is fixed. At least they fixed the game continually crashing at the end of the prologue.
Joe