Since this is a non-engine suggestion thread, I think this should go here.
I think JR should try and find some new samples for enginesounds. I'd love to see a deturbocharged 12-645E3 on the '39 series, a turbocharged 16-567D3 for the '35 series, a turbocharged 16-567D2 for '20 and '24 series engines and a few others. Trainz has a lack of good enginesounds for certain locomotives, and I think JR does it best with their high-quality enginesounds.
I think JR should try and find some new samples for enginesounds. I'd love to see a deturbocharged 12-645E3 on the '39 series, a turbocharged 16-567D3 for the '35 series, a turbocharged 16-567D2 for '20 and '24 series engines and a few others. Trainz has a lack of good enginesounds for certain locomotives, and I think JR does it best with their high-quality enginesounds.