Sounds like you're riding the tail on initiation. You want to solve that with working on centering up between your bindings, rather than locking your boot forward (I'm assuming you're referring to lean adjustment in the boot here).
To help eliminate that pause to heelside and get the board on edge faster, think about coming across the board hip-first on the transition...essentially, "falling on your hip" on heelside, or similar to bumping a car door closed with your hip. If you fall or pop out of the carve on heelside, think about the last thing you were looking at...it was likely downhill, across the toeside edge, rather than the direction the board was travelling (as Jack mentions above).
I went the jump-to-high-binding-angles route, while my wife eased into it by bumping in 3-degree increments. I highly recommend going the incremental way (particularly since you're carving well in softboots). Start off at your old angles on your softgear setup, but add 3 to 6 degrees to the rear. Take a run, then repeat until the rear is within 5 - 10 degrees of the front...if a 12-degree split feels comfy, go with that. Now, start bumping both the front and rear together in 3 to 6 degree increments up to 45 in the front. Then switch to the hardboot setup with 50F and a similar 5-degree bump at the rear.
joe...