Well, they nicely concluded the anime, considering those were 2 major arcs. (even though some characters had their stories rushed)
In my opinion, I think they captured that damn sad but good conclusion of the manga in that anime with the concert + song + flashbacks + that final crying face.
If they make an OVA, i hope it includes ch 190. If not, just any OVA that includes all the goddess together or their host.
Well, its going to be another long wait if they are planning on having the Heart of Jupiter Arc on anime or show the capture of the other characters that were left behind or have an anime about the LN w/c have different heroines captured.
Story Arcs: http://kaminomi.wikia.com/wiki/Story_Arcs