My feedback/impressions after a couple of hours playing:
1) Match Engine (note for some: this does not mean graphics)
It is truly an improvement. The way the players move and stop and turn the other way, or shoot, or pass. It is a mix of more fluidity, more chaos, and sheer beauty of shots and passes and moves. Thumbs up.
2) Squad Planner
It is basically an evolution from the squad depth screen in previous versions. But, for me, it is much more user friendly and visual. In Pre-Season i really use it constantly to move my players around, add potential new signings and see how the squad would look like by designating the players to their respective positions with their rank. The tabs for next season and season after let's you very quickly see what you need to focus on in the future. It also includes my 2nd team or youth players which let's me quickly discover who the future potentials could be. Several times i was like, who is that player and it is some youth on loan somewhere and now i already know 2 seasons from now he will be a major player in that position. There's much more potential to this feature but it is already very helpful. Thumbs up.
3) Scouting
Finally, I can scout. I feel bad for my Chief Scout. At least he can send me reports. But the assignments/focus area, it's mine. My prescious. Really much more user friendly, focused, understandable, logical. Thumbs up.
4) Fans
I haven't gotten far, so this, has had no impact so far. It's another group telling me what they expect. It's nice to see the breakdown of the fans and how much sway they have on the board. Undecided at this point.
5) Agents
It's good to get a feel of what the player will want. And you get to negotiate already. I say I am interested and the agent tells me they looking for X amount of wages and i go back and say, hey we like him but you know we can't afford these wages, can we do something about it? And he comes back with a lower amount. It let's you get a quick feel of where you stand with the player and if it's affordable with some minor digging. Half thumbs up.
6) Tactics tweaks/additions
Too early to tell. Being able to set low block etc. is a good addition. Undecided.
Overall, especially due to the match engine changes and the squad planner I would not go back to previous versions.