I'd suggest the reason for so many transfers in recent years is too many talented players and not enough minutes.
I don't really think that is a valid generalization:
Boykin - left for personal reasons after starting her freshman year injured
Ekmark - left for playing time after not playing well enough in the system to get meaningful minutes
Edwards - left for personal reasons in her freshman year (two months into a season is not about minutes.)
Banks - left for personal reasons after an injury plagued career.
Engeln - Left for playing time after not playing well enough to get meaningful minutes
Johnson - Left for a variety of reasons including playing with her sister after struggling with injuries
Walker - Left for personal reasons
So of the last 7 transfers out four left for personal reasons, while the other three may well have left primarily because of playing time, but the playing time was tied into their ability to perform at the level of their surrounding teammates - in each case there were minutes available on the team the years they left if they had the ability to earn it.
On the current team, we have no idea about our three freshman in terms of their ability nor are we really sure about Butler and I suppose we could say there are questions about our two transfers in, though the general assumption is they have a lot of talent and will thrive. And we of course don't now how the adjustment to Uconn and college will go for our four signees.
On the other side of the 'playing time' issue is a pretty long list of players who have stayed while never cracking the significant playing time equation or not cracking it in their first few years. of the recruited players in the recent past - Chong and Kiah stand out, but Gabby also struggled as a freshman to see meaningful minutes and the jury is out on Butler after an injury plagued first year.