In Tidal 'shuffle' seems to function somewhat different then 'Pshuf' in a Pbind in Supercollider.
Pshuf chooses a random pattern and plays the until you re-evaluate, which makes Pshuf pick another pattern.
In Tidal the shuffled pattern changes each cycle as far as I know.
The nice thing of 'Pshuf' in Supercollider is that it gives you repetition, which is good for a bass groove for instance.
Might be nice if such a shuffle would be included in Tidal.
I like to use the repeatCycles function to repeat the random part (which can arise from shuffle or another function like scramble), but it only repeats it for a finite number of cycles (which works for me, but that might not be what you're going for).
Something that is tricky with randomness in Tidal is that, in its way, it's fixed once and for all, in the sense that a random pattern will always yield the same result at a given cycle. Because of that, I'm not sure how you would go about repeating the same randomly-generated pattern forever (or until you reevaluate), at least in an Tidal-idiomatic way.
maybe it could be possible to have a shuffle function with a seed parameter to initiate the PRNG, instead of using a global one. That way, shuffle x would always generate the same permutation for x