Diesel Railcar Simulator is the first train sim I have purchased since way back when MS train simulator came out and this is far more enjoyable. Until this came out the available train sims on the market have had very mixed ratings but this sim is fantastic. I know you mentioned that the sim currently focused on Diesel mechanical / hydraulic for time being and that's fine (class 35 or 43 or 52 locomotives maybe?). But it would great if you managed to get diesel electric supported for this sim, it could allow DEMU class 205s for instance. Also, if diesel electric were supported, would physics support for purely electric locos (apart from track infrastructure) really be that much more work given that both are driven by traction motors?
Thanks Jakkson! Diesel-electric support will be coming eventually as soon as I get some other stuff out of the way first (the editors for instance). I'll need to research how it works in detail to model it to the same fidelity as the mechanical and hydraulic transmissions. The train editor will allow the community to add the classes you mentioned while I focus on developing the core sim.
It's true that the diesel-electrics share a lot of similarities with purely electric locos but I don't yet know to what extent. There might be some differences in the control mechanisms. The infrastructure is also a major point, not just in the 3D-modelling of the power rails or overhead electric lines, but because of how multiple electric trains drawing current from the same transformer affect each other's performance, unlike steam or diesel locos which are independent of each other.