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In spite of what I see as the drawbacks of this variant (bishops clearly stronger than knights, marshalls able to be traded quickly if developed symmetrically, complex pawn promotion rules that I don't quite like), the game uses a square (rather than rectangular) board and there are no unprotected pawns in the setup, which are arguably improvements over Capablanca chess (although that game's setup allows for smothered and back rank mates, arguably good features to have). The fact that the rooks protect each other, so that there is no need for castling, is both a plus and a minus in my view (as is the fact the player's armies ranks have many empty squares in the setup - otherwise there could be 30 pieces per side, perhaps, as I tried in my own Sac Chess variant, which is a lot of pieces).

My tentative estimates for the piece values in this variant would be: P=1; N=3; B=3.5; R=5.5; C=7.5; M=9.5; Q=10 and the fighting value of the K=2.5 approximately (though naturally it cannot be traded). Note that I rate a N significantly lower on a 10x10 board than on a 8x8, 9x8 or 10x8 board (where I estimate N roughly=3.5 in all cases) as the many extra excellent central squares available to a N on a 10x10 board are IMHO way more than offset by the rather large size of the board, which makes it harder for a N to cross from one side of the board to the opposite one. Also note that on the four board sizes I've mentioned, I've kept R=5.5 as a constant value, changing the value of a B as I felt appropriate for a particular board size(s), in relation to the value of a R.

Here's an early CV invention of mine, a modified version of Grand Chess, which some may or may not like due to the positioning of the bishops in the setup, alone:

https://www.chessvariants.com/play/chess-1010