Note that I already considered it in my suggestion(otherwise I could suggest even smaller difference between bishop and knight)hgm wrote:
One should also realize that uMax cannot recognize the Bishop pair, so the value for the Bishop includes also the averaged bonus for the fact that it might be one of a pair. This should be taken into account when comparing with the piece values in other programs, that give a separate bonus for possession of the B-pair.
pracitcally movei has smaller difference between bishop and knight if I ignore the bonus for the bishop pair.
If you want numbers to be divisible by 0.4 maybe something like the following is better because bishop is not always better than knight and I think that 4 pawns are better than a bishop in most cases(something that your list of values does not see).
0.8, 2.8, 2.8, 4.4, 8.8
Edit:note that my new values give 2 knights more value than rook and pawn.
Uri