Actually, there are percentages if you click on overview and team stats (i think it's called that) and it will display the team's overall shooting percentage.
But are they soo good? For me t is also important to know, if the opposing teams scores aeasy against a team and for that it could be usefull to see the percentage from the opposig team in the scoreboard ... This is an feature would will be looking fine in the team stats to, opposing stats then you could see if the 50 average rebounds are good or bad etc.
When you play in a league with bots, you like to know the scoring against the real teams and not the easy win which are included.