There is no need for fiddling.
For hand flipping it helps to alter the compression but once it is started you end up with the usual setting, same with the needle. It is only if you change the fuel type or prop that you need to find a new optimum setting, but that is the same as for glow. Except on glow you have to take the head off to change head shims.

I don't think that diesel engines are ideal for everyone, but they are great fun for people who enjoy combustion engines. There is no need to try and change that, unless you selling/producing engines, it is a hobby and people should use what ever they feel like using...