Joe - Leaving base early is definitely rampant in the college game. I have many pics with DD pitching where a runner on first was a FULL STRIDE off the bag before DD's arm had even reached her hip on the downswing. The most blatant "no calls" were against certain legacy coaches known for lots of stolen bases... Yep the players are taught a technique that tends to mask their advantage (foot behind bag, etc.).
So yes, I agree. But I think changing two rules would help: 1. Only require one foot on the rubber at the pitch start (but still no step-back), and 2. allow leaping. Since both these require the first base umpire's attention, they could better focus on a base runner. Make the rule changes, then make a "point of emphasis" on calling the leaving early violation. IMO, the no-calls are because the ump is so focused on the pitcher throughout her entire motion - and those astute cheating coaches know that!
Neither of these pitching changes provide much benefit for pitchers with poor mechanics, but for pitchers who REALLY work on technique, these changes could tend to again swing the game back to a more pitcher dominated game. However, hitting has made HUGE strides in recent years (the pitcher masks in the college game proves that).
I'm all for creating an environment where you either work hard and improve your game, or you go home early.