Hi Springbox,
the OT - as a lot of people wrote - can do live manipulation very good… including stutter and live “buffer” effects… (like retrigger short sounds phrases live)… please see the OT as a 8-Track-Live-Looper with tons of efx on board…
but please keep in mind that timing/synchronized tempo is key for that. The OT is super tight in a midi-setup, but if you only record “akustik” instruments, you will have to “tap” tempo, which at the end mostly results in bad stutter timings.
TIP: If you are searching for a cool live engine now and maybe later will start to use the sampling functions of the OT… BUY IT… its gorgeous… but you need a while to understand its structure
If you are just looking for live mangling (without beat sync) also in the future… Buy a bunch of guitar pedals and a mixer with many FX inserts… The quality of the EFX is better (for the same overall price) and its the old dub way… anyway if you do not have a “midigear” controling the tempo, any kind of beatsync efx like stutter/retrigger etc will be a problem live, so focus on delay clouds, phasing, distortion, reverb and so on :-))