Oh, I see. This has more to do with the save system, than with modules. Save system is actually one of those things that I'm willing to completely redesign, due to how hard it would be to make it 100%-compatible with vanilla. If "real-time" reloading of templates would make modders' life easier, then this is the way we could go, no problem.
I hear you - recreating something that already works and NOT improving upon it does sound wrong. I'm coming from the "minimum viable product" point of view. Getting the equivalent of vanilla out with slightly better graphics and QoL improvements beats releasing a shiny but incomplete engine, in my book. I will of course consider adding advanced graphical features - perhaps when the engine is a little more mature?
That's a good point. I will keep this vanilla/ehanced mode toggle in mind and develop accordingly.