I’ve got a 2014 Sight 7.2 (same spec as the 2015 7.4) so can’t comment on that shock, but the monarch on mine used to bob a bit in the granny ring and top end of the cassette. I swapped to a 1 x 10 drive train and there’s less bob now, I guess because of the different chain tension? Either way, it wasn’t enough to annoy me much and it was a little used gear.
Otherwise a very capable bike. Climbs well, descends very well too imo and if I was a slightly more confident rider I don’t think I’d have too much trouble keeping up with the 160mm bikes on the downhills sections. It certainly copes really well with all the slightly mental trails in Whistler OK.
The only thing I’d change would be to swap the Rev mine came with for a Pike but the 7.1 Carbon has a Pike as standard, so happy days.