You know what this game needs? A comprehensive manual and a guided tutorial and proper documentation
It already exists. There is a shitload of tutorials in the wiki, let alone all the video tutorials.
And three distinct difficulty levels
Not only difficulty levels already exist, but there are many more than three. If you consider all the embarking locations and features (Evil/Neutral/Good, Benign/Neutral/Savage, Aquifer, Volcano, Rock salt, etc.), there are many, many ways to play the game at different difficulties. Of course, this doesn't take modding the game or challenges into account.
and better graphics
Tilesets and 3D viewers.
and more mouse interface
I think some tilesets do that.
and better skill management
Manager program.
and a bug-free military
Older version.
and no more unkillable forgotten beasts
Mod the game.
and a better framerate
Disable features such as weather.
and wheelbarrows for the dwarves
I think bins, barrels and buckets do a pretty good job alone.
I don't see the point of the whole debate. Toady One and the whole community have been kind enough to provide us with plenty of easy ways to mod and use the game as we wish. If you find the game too hard, mod it. If you find it too easy, mod it. If you want more graphic support, get a tileset. If you don't like micromanagment, run a manager. If you want more help, go to the wiki or ask the forum. I've already done it and I have never been mocked or insulted, even though I'm quite new to the game.