I have a LOT of fond memories of that game, but I don't like the updated version at all.
First, they need to package it better. I installed the sourceforge version of SCII on my computer, and the installation consists of over 16,000 files (mostly PNG images). It took about a half hour to install on my Athlon 2600+!
Second, the 3DO version is actually quite different from the PC version. Most small text and icons have been replaced with huge (and ugly) buttons which make the GUI harder to navigate. If you have fond memories of SCII, I recommend building a legacy computer with a true Soundblaster 16 to play it. The "updated" version is big, bloated, and not that good, and I doubt it would work well on an unexpanded Amiga.
Sorry, but they didn't make a straight port. They "improved" it and ruined a lot of stuff, IMO.