juanabolche,
as pointed out by
TheMarksman, read here to have an idea about what's going on :
viewtopic.php?p=265460#p265460 .
You also can notice here that the game just got 2 updates in the past 8 days :
viewtopic.php?p=265986#p265986 .
The good news is that you don't have any obligation to purchase the game now !

I'm very thankful to everybody who did that so far, as it obviously feels risky because most (all ?) developers around the world are very often late, and I personally got delayed a lot in the past few years with the changes in my life.

But of course, you can wait for the demo to be sure you'd like to purchase the game or not, no worry.
TheMarksman,
I'm sorry you feel about that about the current state of TE4, and I'm a bit afraid once it's done, you'll just add "and it has some new anims" to your description...

Personally, I'm already happy with what the game has to show, even if obviously we're quite far from completion ; but the physics improvements are tremendous (at least for people looking after realism

), the new menus are very welcome, the World Tour improvements are nice (eg: Olympiads, random future years, etc.), and the 3D stadiums are a big step forward (of course, we're still far from AAA productions, though).
Maybe you're waiting for improvements in the gameplay ? Some are planned, but it shouldn't have anything really groundbreaking.
