could most definitely try but not sure how that would work timings wise? Still an hour nap or longer.
Yes, same length nap Hun.
Does an earlier nap correlate to an earlier morning? It always has seemed to here strangely...
Something I have been looking into WRT older LO's and the 1-0. It appears to me so far that and early nap and EW don't necessarily relate once a LO reaches this age, but I'd be interested to see if the other ladies agree

If he is waking at 6 consistently, then you could try this:
WU 6.00
Nap 11 to 12
BT 7.00 (see what time he goes to sleep)
Looking at his schedule the last couple of days he is falling asleep around 6hrs 15 after his nap. IF he will nap sooner, a 7 pm BT gives you 7 hours from nap already, meaning he should in theory fall asleep much faster. Also the sooner nap will help him deal with the afternoon length hopefully, as it is more restorative. You could even try winding him down at 6.30. I guess if it worked that WU would shift later and you might be looking at the above routine but with a 1 hour later shift.
Does that make sense

It's just often better to try shifting the nap rather than shortening it as a first port of call, because during this transition a longer night doesn't always follow a shorter nap, it just helps the LO go to sleep better.
x.