My riding buddy has the 14x, its only just worn out a set of bushings after nearly 2 years. seems to be this problem is exclusive the the 15- range.
i don’t know what you lot are on about about spacers either, there are none!
the play in mine happens where the swingarm meets the “T” shaped part of the linkage, every time.
the only things that could cause that are:
Misaligned linkage part
Misaligned swingarm
Linkage bracket on frame misaligned
excess flex in the swingarm putting too much leverage into the bushing.
I’ve bought a new frame now (not a Saracen). Shame as the 15x is utterly magic to ride.