I think it looked pretty meh to be honest, but I also think it should be taken into account this was from an internal (ie: Not to be shown to the general public) beta, and the map shown is not one included in the actual beta that will becoming out.
Having seen a number of commercial releases in similar early forms of development not normally shown to the public, there is most definitely reason to believe the visuals could improve significantly between now and relaease.
Once the actual public beta is released, I think more direct criticism would be warranted, as I expect it would closer approximate final product. If it's still looking meh, then there is definitely cause for concern.