I played HBD for enough seasons to evaluate it, and I don't like it.
There are lots of features and options, but some of the deadlines are absolutely critical or you will screw your team over completely.
For example, I played the game for over ten seasons and was familiar with all the features by that point when I couldn't get online for a period of about three days. If this was HD, unless it was recruiting I'd have been completely fine.
In HBD, I didn't add some of my top minor leaguers to my 40-man roster and that exposed them to the rule 5 draft, which never should have happened. Could I have done it earlier? Yes, but ideally you want to wait to do that so that it doesn't start them on their way to arbitration as quickly. Boom, my entire plan for my team was ruined.
I was soured on the game at that point. I tried a return recently until I realized you have to check the team about three times a day to really manage it well, and I can't do that so I gave up on that too.