Kounde will be registered once Auba is sold. Memphis is also leaving along with Dest most likely so a Frenkie sale has no impact on that situation, no link.
As for the saga. I wonder if the news of United's offer 'expiring' was to soften the blow to the fanbase. If it came out you wasted 3 months chasing a player who has zero interest in joining, I would imagine some of your fans would be burning down Murtough's house. I'm not sure a few pints down the pub would work this time.
Frenkie is expected to start this weekend vs Sociedad and Xavi has admitted should he stay, he'll play an important role. Posts here about him being a **** or benched are childish fiction. The player stood his ground, is getting paid the money he's owed and will have a great chance at winning trophies this season with his dream club, I wouldn't call that weak mentality. Joining a club only for $$$ at 25 would be weak mentality.
Should there be a significant breakthrough on the Bernardo transfer (looking very unlikely now) we could see one final attempt to get him to leave. I'm sure United can find the money and reignite their interest and Chelsea also waiting.