They'll probably make 1 AP give you up to X movement. Even now if you don't use up all the movement allotted for a single AP, you can make zero AP adjustments to use up all your movement for that AP. I imagine 1 AP in the new system will be about 3 AP of movement in the old one, so you'll probably still be able to take a step, cast a spell, and then shift over again with the rest of the movement from that first AP. Now, if you just want to take a little step just to peek around an object or something, the new 1 AP movement will be a bit less flexible there. Maybe with enough speed you'll be able to make zero AP adjustments? You're probably right that it'll just make movement more valuable overall.
