Players should have been waiting to ambush him, looks like he'll make it now though
about what you're talking about an ambush? the last time you played???
I played a little a couple of days ago to test attacking the centre.
from the small probe, i realized it's definitely possible for a small group of people with 10 or 20 hunters each, to take over the centre,or cause significant damage.
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as soon as people realized the central guy was on the way back with 15-20k coins (which he's been accumulating for days/weeks?), they should have built up some greens and yellows and ambushed or prevented him banking.
If you want to win, you need to try harder and play better