I definitely agree with this, however I just hope howlers would not be too frequent, otherwise they would take away from the game.
Another query which may or may not have been raised with the DRS, what happens with India? If they continue to say no to the DRS system will any games involving them exclude DRS?
And also, in career mode, if managing a country, can you deny the DRS? And would you be involved in ICC meetings? That may be quite deep, but it would increase the realistic nature and longevity. The best career mode I've played is from the NBA 2K series, and one of my favourite aspects is the meetings and press conferences as it increases the realism of the game. Just a couple of my thoughts, hope they are easy to understand.