The go-between is so important positionally, I would happily start the game down both golds and a bronze if my opponent lost both their go-betweens. More moves don't necessarily make a piece more powerful. Even without promotion, I slightly prefer vertical mover over rook. It has a smaller profile. Against a player who appreciates its value, then without promotion, obviously rook is better, but with half-decent promotion odds I still take the vertical mover.
If I had to convert my eval into chess terms, I feel like this game is currently around +2.3
I am not sure if I get what you try to explain.
About DH > DK I have the same feeling, because it seems the colums are easier to be filled with step-movers and forks are in the lategame easier made by DH.
R > B is also understandable to me, because B can't change colour.
But VM > R and GB > G I don't get. Does this refer to the fight at the flank? G has same plus additional moves compared to GB and a better promotion option. Therefore I don't understand that, if you don't speaking about the important position the GB is^^ not sure
For VM > R it is similar but there I can somehow follow if you prefer VM because of promotion (I really like the flying ox movement).
Thank you for sharing your experience with me, I'm always interested
Current position I would evaluate that you are a little bit better of.
You controll the free room at the moment and the material is also a little bit to your advantage (I think besides value of the pieces it is a good think to have more mayor pieces than the enemy. You have the lead here by one piece). The one good think I have right now, is that I moved my step movers more often, so I might get them into play.