I've got a 2014, 3.0 TDi Quattro. I've had a Revo stage 1 map installed and fitted an itg air filter.
0-60 should be in the very low 5s, with Revo quoting something like 305ps and 600Nm.
After asking a few folk, it would seem the general consensus is to get anymore power, I'd be looking first at a DPF delete, followed by larger intercooler and goodness knows what else.
I've decided not to go any further along the tuning route as I'm not going to remove the DPF.
I think the Revo stg 1 map was a good buy, mostly for how it's changed the driving characteristics of the engine. Much more responsive to throttle inputs than before. However, the ECU map does seem to have high lighted issues with the S-Tronic bear box, which is sometimes slow to change from 1st to 2nd.
A TCU map might have been on the cards, but as I've a Revo ECU map, I'll be waiting to see if Revo produce a TCU map for my car at some point in the future.