The key is getting them at their optimum playing weight.
That doesnt necessarily mean losing weight. In some players they may perform better with a few pounds put on.
Its upto the fitness guys to work out whats best for a player, taking into account their position and role within the team for the forthcoming season
Certainly Roby seemed to be at optimum weight last year.
While the extra timber on Wilkin reduced his speed and mobility.
From looking at Wilkins slmiline physique, i reckon he will be used a lot wider out this year. Fulfilling the wide running backrower role.
I personally think that this season with correct planning we could have an excellent balance within the pack of size and pace. Being able to go big, or fast depending on the opposition.