I think it's a bit late to lie about his build now, even if he already has high Recovery stat, mostly because he has Lusha in his party. Hiroki can hide his Evasion but Lusha can't hide her Accuracy. Other people will just ostracize her again. She can't increase her Acc now or else she'll increase her chances of hitting Hiroki. These two have their own unique synergy.
But anyway the recruitment is moot for now since they're now reunited with Ren and Ruri.
If he had put more points into healing, he could just heal the poison AND freed his friends from the king.
Don't people get new skills from
those blank books from dungeon boss chests? He got 「Shield」 that way. Even if Hiroki puts points in Recovery, he might not learn status cleansing skills. If they can acquire skills from spending points, he should've had more than Heal and Regen at first with his 100 Recovery. But idk maybe they explained the system better in the novel but I haven't read it.