The parts in bold have to do with your skills using the controller. If you over pursue, that's on you. I have no trouble making the tackle, you just need to use a good pursuit angle. The lineman are not impenetrable by any means, I am able to shed blocks just fine. I also personally control the MLB and have no issues covering the middle of the field, if its my zone.
I don't shed blocks every time, and sometimes I blow coverage, but thats football.
So it's more realistic now, it's tougher. You can't just blow through the line, you have to work for it. If I can manage a sack in a game using my DE, that's exciting because I faced a big challenge to get it. If you want it easier, put it on rookie settings or something.