Levius is very solid "sports" anime with the blandest possible main protagonist/antagonist duo I've witnessed in a while. The ironic thing is they have some internal characterization, but as persons they're just there.
The supporting cast is top notch though and they make it a joy to watch. The same goes for "lesser" antagonists.
It's also very interesting in technical department, as it shows the road CGI anime has come from the titles like Knights of Sidonia. Battle scenes are smooth, explosive and keep you on edge. It actually makes you hopeful for the future of the CGI animes.
(opening and ending gonna stick with you a while)