Since this is Intense related. I've just gone from a Primer to a Sniper. No issues at all with the Primer over a couple of years but I knew going into the Sniper that there could be issues with the bearings in the upper link due to no cross brace.
What I didn't expect was how loose it still felt when it was all torqued up to spec. It was a little worrying actually. Reading over on MTBR, a few people have done a brace mod to the upper link which seems to have solved the issue and Intense themselves are prototyping their own iteration.
I decided to knock one up last night with some "all thread" and a spacer between the links. Just from a wiggle test it's stiffened the rest end up dramatically. No idea why it left the design phase without a brace here. All the other models in their lineup have it.