I suppose I may as well float publicly something that has been considered - whether people would support changing the Five5 match type, and thus ranked quick matches, to have a reduced amount of wickets per team - in order to give some incentive to care about your wicket online.
My worry about any specific changes that might make online play differently - such as mentioned above with a limit on how far you could move in your crease - would be that people are naturally going to find new exploits, I could imagine if batting got limited in some way, then there would be a delivery bowlers could then use that would be very hard to counter, that currently isn't.
I've certainly had some interesting and fun online matches so far.