Thanks for all replies, they have been very helpful for me to get more understanding on what happens in a build like this.

I think I will proceed. I'll post an update how it goes if I remember, but the delivery time of the parts will be long so it can be into next year before I actually start building.

To summarize:

My current understanding of this design is as follows: lacing 36->24 2-cross 2.5 degree offset will not be as optimal in terms of spoke tensions compared to a standard 24->24 2-cross lacing, but I think the issue is small enough that it can be handled by the rim.

The root of the problem is that due to 10 degree flange offset (360/36) rather than 15 (360/24) the pattern will require two different length of spokes, differing about 2mm, and the short being slightly less tangential than the long (less tangential = more force/spoke tension required to put the same amount of torque to the hub than a more tangential spoke). They will be arranged such that seen on one side isolated, all the short spokes apply torque in one direction and all the long in the opposite, meaning that the short spokes will need more tension, about 3% more to completely balance out.

On the other side of the wheel the pattern is mirrored, which in theory means that if you tension all spokes equally net torque would transfer over the hub and cancel out, but in practice that would probably not work, so the 3% extra tensioning of the short spokes is probably required, to keep each side balanced in itself.

This will leave a pattern around the rim of high high low low spoke tension, which is not ideal (high low high low would have been better). However as the tension difference is only 3% and the rim is a reinforced high profile carbon rim I think it will work without any significant radial compression issues.