I was having a hard time with Zero bar passing at first, and almost changed to 1, but I stuck with it and now I'm glad I did.
I've similar sentiments on the difficulty. I always start a game of BAL on Superstar to see how the game is, then change it until I feel comfortable (good balance of win/loss vs similar level opponent), then I start a Master League at this level. This year I had to drop all the way down to regular. However after a few MLO games once it was stable, along with about a 1/4 season of Master League I moved it up to Pro. At the moment my team at the end of the first season is high up the 2nd Div and is stronger in depth than a large portion of the league, so is about right. However I'm currently on 1 bar/basic/basic. So due to the way the CPU played as I trickled down the levels in BAL, I don't want to go higher in the difficulty setting. As individually I can't take advantage of the TOP/Superstar approach by CPU teams, but as a unit (controlling all) I easily could, but it would mean all my play would be exactly the same way, which would be boring.
Instead, if it becomes too easy on pro, I'll start by first making the controls more manual, then when those changes 'run out' I'll change my transfer policy and perhaps run an under 21 only team or something.
Unfortunately, the higher difficulty levels appear to have used a couple of rather 'cheap' ways of trying to make it a greater challenge, which instead of giving a harder game, just says 'play like this to win' and rather than having a variety of different goals appearing, you' end up with just one type of goal for CPU, and one type of goal for the human team.
My only annoyance in this, which I hear is in ''other' games, is that we can't tailor our difficulty settings. I'd like to have the difficulty increased in areas like reducing the 'mistakes' the CPU makes and improving the response of goalkeepers, but I don't want the things like 'make all players boosted for pace/strength/tenacity' in order to make your opponent more difficult.
I'm guessing that there's a potential for this in patches once modders have fully understood the available variables across the platforms. But then this approach is only available for modded console and PC users. Not the majority of players.