I would have to disagree, the engine should have the option to create better games not just mostly cartoonish ones. I mean if you pay so much, especially for the PRO version the engine should be capable of doing some big, high quality games too. And new Shaders could be really useful for simulator type games even though you could make them yourself, some easy add-on already made shaders would be nice. I mean look at Unity's shaders and how many more, and better ones there are compared with 3dgs. Also GIF support should be an easy feature to add and would remove the need for old fashion track based sprites and unneccesary code. The weather script part, I'd have agree with you, but still the FPS shouldnt drop so drastically when you use them.
Otherwise the engine is pretty good, I liked it from the beginning, since it teaches you lite-c and then the transition to c++ is much easier. Great community and support also.