Oh yeah! That would be a nice little touch, for instance- you come to the wicket and the umpire says "right arm over, 3 to come" or a new bowler comes into the attack and the umpire tells you if its "left or right arm" and either "over or around". Also even being able to take guard would be a nice little touch too.
Edit: Just some other little things the umpys could do..
1) Come on to the bowling side for excessive appealing... Haha
2) Signal the last over of before the session, day, drinks.
3) Poor light- maybe a cut scene where the two umpires intervene and look at the light meter.
4) Check the ball at the captains request... Maybe this could be used as a tactic by the fielding side if the ball isn't swinging, but maybe the replacement will?...haha
5) Checking the time to see if there's time for another over- hopefully spinners, slow and medium bowlers get through there over quicker then a fast bowler to make this a viable tactic.
6) Signal short runs- obviously this would need to be an added feature for running between wickets, maybe timing when to call for runs, too early or too late could result in short run or slow turn.
7) Power plays (not sure if this is already in game or not)
Yeah that's about all off the top of my head, understand these aren't in actual fact 'little' things and that its probably fairly technical to incorporate, but I think they would definitely give the game some verve.