1. I apologize in advance if this topic has been brought up before.
2. I do not know if such a proposal is possible.
Perhaps this is only a problem in the lower levels, and perhaps it is not a problem at all, but I would like to propose that when new leagues are put together each season that pitch conditions/upgrades are taken into account when forming leagues.
I have been dutifully balancing additions to my roster with additions to my facilities, and as such I have a pretty good roster and a pretty good grounds. I am in a league with many teams that are still playing in their starter "stadium", which amounts to little more than a couple of chairs spread out around a pasture with a few candles on stick for light and a cow wandering around with the score written on its flank, but who have impressive rosters. When my team plays away matches at their "stadiums", my squad tends to see an increase is injuries.
Maybe this goes away as one gets promoted, but I would like to suggest that if enough teams at the same level exist to form multiple leagues, that stadium/pitch conditions are part of the discussion for how to create each league.