I have this bikes younger brother, an ‘84 610. It has the same 43cm chin stay length, and the head and seat tube angles are only different by half a degree, your bike has 73.5 and mine with 73 even.
I use mine ALL the time. I’ve had a couple Cannondale Crits from ‘88 pass through my hands, and I have some grail tourers, a Trek 720, and a Miyata 1000. The Trek sports geometry just plain works. It’s a true balance and I don’t think it’s a compromise between the extremes of bike geometry.
It will track straight when I’m tired at the end of a long ride, but it’s still responsive enough to whip around traffic cones or the odd door being opened into the bike lane.
It manages to be responsive and stable at the same time. For my uses of commuting on the daily, and the occasional 3-5 hour weekend group ride, it’s ideal.
As much as I love the ride of the tourers (and believe me I do!) the 610 is what I reach for most often, and by a large margin.