I don't think they'll move on. 2 guys the team drafted who became key cogs in a golden era for the club, winning 4 rings.
At this point, there's no real point moving on. Neither Dray nor Klay would return you any great assets in a trade. You could let Klay walk in free agency, but I think the PR hit with fans, and players wouldn't be worth the additional cap space. (They'd still be around the luxury tax point anyway)