I didn't realise that Duke 3D had been ported to the Amiga. Where is the download link?
Also it would be horrible to play without freelook. It is not DOOM, the maps were not created before the advent of freelook, that would make it damn near impossible.
I remember Dark Forces kind of having a free look system, but it's consisted of pushing the UP arrow key to look up and the Down Arrow key to look down, which in the end sucked a lot, though thankfully DarkXL is on it's way (at least for Windows users atm) and that will clear up that problem.
Anyhow, yes, please post the link to the download, and yes if the game runs crap, it definitely deserves an update if anyone is willing! Duke was one of the best games ever. I still play the XBOX classic homebrew port of it and Shadow Warrior all the time. Works great with dual analog!
