Was it your first time? In previous years it's been in much worse shape believe me! This is as good as it gets, with the harsher winters than the US Parks, it all takes a beating.
Thats pretty standard for Paris since the attacks, they've always had them all over Paris in general since I first visited 17 years ago. The armed soldiers are not actually on property though, just by the station?
Comparing to London, I see armed police with rifles all the time in the City area.