Except a few Indian players most teams in the WPL are dependent on the performance of overseas players. India's talent pool in women cricket is saturated. I am sure the BCCI would work on this issue to make things more competitive. At the moment it is MI who are looking as the front runner to pick the trophy of WPL.
It is true that overseas players (especially those from Australia, England and South Africa) are dominating first season of the WPL. And it is not surprising. The BCCI ignored women's cricket for so long. They should have started the league at least a decade back, but then the Sharad Pawar-N Srinivasan mafia was in power and they refused to invest in women's cricket. But ECB and CA launched franchise T20 leagues for women without any delay, and as a result they are in such a good position now in terms of women's game.