I like the new middle section and the North-South road through the castle. Can't wait to see how these new changes will play out (PS don't forget to change the loading screen, lol).
For any further future improvements has opening up West and East entrances into the castle for vehicles as well ever been considered? This would further help to remedy the 1v1 bottom problem as it would open up a way for the second-to-bottom player to become involved in the castle VP. This would further decrease the boring middle muni/VP meatgrinder and would open up flanking routes for this player to come up behind the middle defenses through the castle passage (you can do this with infantry now but it's a death sentence due to the retreat paths usually taking your squads back through the middle).
IMO large sections of a map being impassable (I think Port of Hamburg's canals do the same) is always bad for strategic gameplay as it hinders flanking a lot, makes attacks too predictable and static defensive lines too good.
I think the infantry only castle was a cool idea but it hasn't really worked and it is time to fully include the area into semi-regular gameplay. The new N-S passage will definitely help but I think there's more needed to shift the focus.
Its a shame, that you did not saw this here for 2-3 months ago
And rosebone first made the castle vehicle able ( you could have a KT in it xD) But I declined it.