I am interested. I have OOTP13 (last season) and not sure of all the changes but a little overview for those that don't know...
First of all, we can start with the full MLB universe including all minor league players with every player down to rookie ball. We can choose to release all players and draft 175+ players each in an full organization draft. You fire/hire three man coaching staffs for each team in your organization along with a MLB bench coach, trainer, and a scouting staff. You can set up your lineups and staff in probably as specific manner as you would like (at all levels).
The MLB universe tries to match MLB rules in all areas. We will draft amateurs each year with free agent compensation. Either you have an owner that controls your budget or you can manage your entire budget (payroll, coaching, scouting, player development, draft and international FA signings). We can choose to equalize the budgets.
All that said, we can control the environment in any way we choose. And you can control your team in as much detail as you like or let the AI handle any responsibilities your are not interested in. I have never played in a multi-person league so I am not sure how that works day to day.
OOTP14 was I believe $25 during the all star break and the price will drop again at some point after the season. OOTP15 will come out in April typically a a few days after the season starts.