Hm, this is what the garden of an obsessive compulsive friend of mine looks like. Very tidy, all straight lines, etc.Hers has all the plants trimmed to look exactly the same, too.
Sure would look nicer and be happier with a good cover of mulch! I'd think the blooms would last longer into the fall with mulch on the beds, too, given how early there can be cold weather up there in Denver!
What a shame there were no ID tags. Maybe find out who is responsible for that garden and e-mail them some suggestions? There might be a volunteer group that tends them . . so look out, they'll ask you to come help!