Simpson is only 30 next season, so no worries there.
In Sharpling's case, being 34 next season may stop him being a top 30 player in the world, as he was at 33, but he'll still be a top 300 player and an automatic selection for the NT, I should expect
Hongs hasn't lost a skill all season, in fact he gained an extra level in shot blocking. Not bad for a 33yr old
(But, I need to shift him to create salary room for a third 170k+ NT player, should I be able to track one down) So, Hongs might well be someone else's NT player before too much longer.