Trinamool mellows; has Mamata figured out Congress' new math?

Trinamool Congress chief Mamata Banerjee might have demanded the removal of party man Dinesh Trivedi as the Railways Minister but nothing much seems to have changed on the ground. The Congress, which is reportedly toying with the idea of replacing her party with the energised Samajwadi Party in the ruling coalition, seems to have taken a hit at Ms Banerjee's bargaining power. With Mr Trivedi continuing in office as minister, has the Trinamool chief overplayed her cards?