Err… yeah I see what you mean. You want to change each trig for the scene. I’m new to this trick so that makes sense why someone pointed out only two slices when using scenes. I would assume you can P-lock the trigs but then for your scene you can only use one slice when faded over. Yeah that limits that feature a bit.
Depending on how you are performing you could use the scene switch trick where you set the different slices on different scenes. When you want to change what slice plays just fade all the way to scene B and hold the scene B button while switching the selected scenes on the fly. Still not as nice as being able to P-lock new slices per trig but a bit closer.