I really liked your chart and for me it hits the nail on the head as to which games win in each category. I'm really excited for the improvements/additions you layed out and I think you are really headed in the right direction. The addition of more fleshed out tiers (especially air units) and adding naval will really spice things up IMO. The third faction will add some needed visual flair and really help with the look of battles. The additional defensive/econ structures are also good to hear about.
Overall I think you've got a solid game plan layed out here and the chart shows me that you really do know where Ashes is lacking at the moment and where resources need to be focused.
Single player isn't too important to me personally but I know some people love playing campaigns so I'm glad there is additional content in the pipeline for them as well.
My only other thought would just be a fourth major category which is UI iteration. Keep up with the UI polish and Intuitiveness while you are pushing content. (I'm sure you are but it wasnt in the list) This is one of the major reasons SupCom and Starcraft are/were so popular. Although their mechanics can be unforgiving to new players the basic interfaces are very easy to understand and almost always make sense. Ashes has come a long way in this regard but still has a ways to go before matching the polished feel of other games.
On a side note, I know how you feel with Starcraft... I played diamond level in WOL and bought LOTV to get back into the game but it is just so APM intensive now that I can't bring myself to play ranked anymore. I don't mind micro (actually enjoy some) but the APM required nowadays with all of the harass options/usable abilities has really made me gravitate away from Starcraft.