1.) I played the demo through a couple of runthroughs. That would, of course, be the point of the demo - to play the game and get hooked. I'm merely explaining my thoughts on the matter. I also played EU2 and EU3 both for a long time. (I indirectly alluded to this when I said I'd probably pick the demo up again.)
2.) Your beliefs for Paradox's motives are flat wrong. EU3 was designed as it was largely to resolve complaints of how EU2's events quickly started to make little sense given the result of even less than a century of gameplay, and that the hard-coded historicity led to playing based on events you knew you would happen (getting Gustavus Adolphus or Suleiman, for example). The 3D graphics were chosen to free up processor power for the game (so that the graphics could be offloaded to the graphics card). While I agree with you that the FtG map is better looking than the EU3 vanilla map, the EU3 map is probably still far easier to customize and make changes to (it took years and a LOT of work for any EU2 mapmods, hours for EU3). I personally use the Hand Drawn Map for EU3, and it's beautiful, as are the maps and UIs for MM and MEIOU.
3.) As I understood the events from the demo, the nonhistorical game still uses the same event methodology, with a historical option and then a lower likelihood that the AI picks a non-historical option. I played AGCEEP extensively, and while having more and better events was certainly cooler for a while, it didn't change the fact that the events fire on or around the same time, for the same reasons, and after a while you know they're coming.
4.) Johan was the lead dev for EU1, EU2, and EU3, and he can't go back to EU2 either.
Thankfully, I know that most of the other folks on this forum are great folks, so I'm not put off by your rudeness. FtG seems to have a niche for players that preferred EU2 to EU3, and didn't migrate over to MM. Had MM not taken off (with the eventual release of MM as a standalone), I think FtG would have more players, but I'm not so sure that it would have sold significantly more copies.
That's just my analysis, knowing what I know of being around mulitple forums for years.