Regarding the leg glance in test matches, I think the leg glance shot itself is fine. I've found that by moving the fine-leg finer, the number of runs down there is reduced (I've set it to -4.5 and 5.7 in the field editor, but maybe you have a better idea for it).
Another small problem with the fields is that with the very aggressive fields, some of the outfielders are set as 'close', which means that they take evasive action whenever the ball is hit at them instead of catching/fielding it, even if the ball is skied in the air. For example, on Test Fast Aggressive 2, both the midwicket and mid-on are classed as close fielders.
The main problem in playing test matches is now not the out-fielding but overthrows, which occur at both ends. I don't know if this is regarded as the same sort of thing by the game, in which case it probably won't be fixable. Am very impressed with your patches though, well done!