Control with offensive oversize blade

Hi Sir,

A week ago, i had bought a stiga offensive oversize blade since i had developed good control with the earlier blade.  But now,I am facing blocking problems with this blade.  Some of the problems are:

1. Due to the heaviness of the blade,I am not able to quickly move or adjust the angle of the blade for the block when my opponent does a powerful loop.  The ball will either sail off or i miss the contact of the ball.  How to quickly move the blade and adjust the angle for different spins of the ball.

2. I am a left hander.  When i hold this bat with the shake hand grip,the three fingers which come on the handle are not locked.They always go up which results in inconsistency of the strokes.But when i hold it with my right hand,the fingers just perfectly fit on to the handle.How can I get this perfect grip with my left hand.

With regards.