there is no improvement in the scripting part between the two modules, only a cosmetic change on the surface, a stylish uplift of the art, right?
Then actually I am against keeping both versions and of course favour the new version this thread is about.
And it shouldn't be called sierra improved, only sierra-like.
to keep some nostalgia, the old (and ugly) roger sprite could still be kept in the sprites tab or even the complete view of ugly rog. This is a template and offers some variety this way and these are just a few kb of nostalgia and every pc nowadays can handle this extra load

hmmm, the mousecursors in the old version where ripped from sierra games or repainted version of that, so these mousecursor sprites and the menu images and the menu gui of the old template should also remain to make it easier for people that want to make an original looking sierra fangame and can just switch to the original gui with a simple click or replacing gNew with gOld in the code.
It is that there are people that know what they are doing with the sierra template and produce their own great art for the original sierra template and then there are noobs that don't know what they are doing and when chosing the original template it results in crap and I'd prefer noobs to just use the gui and mousecursers of the new template...