BLM is basically the same, but there is a couple of nice things that do help with movement. Another charge on Triplecast, another charge on Sharpcast and Paradox is an insta cast in Umbral Ice. You can also gain a Polyglot stack every 2 minutes, which i an extra cast of Xenoglossy/Foul, both being instacast.

BLM still requires foreknowledge of a fight in order to stay stationary as much as possible, however the leeway to the movement has been made easier to plan.