Nah 1.3 looked fine, the only thing that looked a bit strange was the arrows on the scroll bars for the windows. otherwise it was clean and elegant.
Also, when I used 1.3 back in the day I used a dropshadow utility to spice things up a bit, and combined with that it looked better than...
Mac OS
Windows
GEM
And this is without considering it was, and still is, one of the most efficient pre-emptive desktop multi-tasking GUIs ever.
Only thing is...orange was replaced immediately by me....orange was such an 80s colour LOL