At bare minimum I expect stats to be on the same lines as DBC14, i.e., ability to view stats for your career player across multiple formats separately (T20 Domestic, List A, FC, T20I, Odis and Tests). For a batsman I would expect Matches Played, Innings Batted, Not Outs, 50s, 100, HS Score, Average, Strike Rate, No. of 4s, No. of 6s to be tracked at minimum.
The reason I don't play career mode in DBC 17 is that I don't get any satisfaction coz the stats are not tracked and are incorrect. I spent hours poring over my stats in DBC 14. I set targets for myself how much I had to score every series to get the average up to say 48. These stats not being there means there's no point for me to play career mode. I've reverted to playing DBC 14 for my cricket fix so I can see my career player's stats and see how I've improved or regressed over the season.