Wicks had to be replaced - so we signed Matagi (thus the late signing)
Paulo had to be replaced so we signed Vava (we needed a "big" boy)
Watmough had to be replaced so we signed Brown.
We lost 3 top 17 forwards so we replaced them.
And on Pritchard, he probably showed some interested in coming back maybe we us, and it was to good to refuse considering we have cap space available.
And doubt the first three are on more then who there are replacing.
Regarding forwards / cap, I reckon most squad may have a forward or two outside their top 17 on more then the minimum. It's a tough game and you probably need 3-4 more quality forwards outside your top 17, and you don't really want them to be crap!!