There are two aspects that are needed in Ashes that are lacking. I really hope to see them implemented soon, as they are pretty essential aspects for MP players.
1) Global Chat Lobby - This is is very much needed. Pretty much everyone plays ranked 1v1; never even checking custom matches. This is unfortunate as I know more than a few players, including myself, prefer larger games. Some have even stopped playing due to not being able to get large matches going. A global chat lobby, which is entered automatically upon going to the multiplayer tab, would help resolve this issue. People could openly advertise their game so that everyone could see it, including those who are already looking for a ranked match.
2) Replays - I know this is on the agenda and I hope it will be implemented soon. The inability to watch replays is very hampering to the competitive aspect of the game. If you can't watch replays, you can't review what your opponent did nor watch over battles to find out why you lost them.
3) Detailed Unit Comparisons - I can't really find any information on all the unit details (the manual is very brief in it's descriptions). This makes it difficult to really compare and know more effective counters.
I know that the devs are focusing on adding other components to the game right now. However, I really hope that these, especially the first two, are added soon.