Ah right.
I've now played with the recorder on my Alpha and the borrowed Pico I had for a while, and it's beginning to make sense.
I still think that having the loop start points all synch up to the first one would be a good option to have (not quite sure what the exact mechanics of this would be), since it makes more musical sense to have parts drop in/out at the start of a repetition instead of somewhere in the middle. At the moment you are forced to stagger the start points of your takes, or else wait for a whole repetition in order to start playing where you know the start of the previous take is. Playing multiple takes on the trot is difficult as you have to take time to switch instruments.
Two more thoughts, and a question occur:
Question: When you arm something for recording, what is actually being armed? Are you arming the instrument, or the keygroup on which it is being played? The Alpha has per keygroup arming controls, while the pico has per-instrument controls but I wonder if they are silently arming keygroups, with the keygroups on the Pico having a one-to-one mapping to instruments.
Thoughts:
1 - it would be nice to have some kind of centralised arming controls on the Alpha, either per instrument or per keygroup depending on how the arming behaves. At the moment to arm 4 keygroups you have to go into their respective splits and prod the arm key. Having the arm keys altogether would be nice to arm 4 or 5 things at once like you can on the Pico.
2 - This depends on how arming works, but it would be nice to be able to point the instrument selection keys at a different keygroup (much like you can point the scale selection keys at any keygroup). This way you can split the keyboard, leaving playing keys in a large keygroup, and instrument selection keys in a smaller keygroup. These selection keys would point at the larger playing keygroup. Then you can arm several instruments (i.e. this requires that an instrument be the thing that is being armed, not the keygroup), then play one take. As the take comes to an end, you can use one keypress on an instrument selection key and immediately start the next take.
Thinking about this, maybe a better way would be to have some way of swapping between splits with a single keypress, that way you could put one instrument per split, arm all of the keygroups, and then at the start of a new loop you can select the split quickly and have everything ready (instrument, arming status, octave settings etc.).