You actually posed a possible solution there.
Nice!
Also consistent with the current and upcoming seasons.
Season 20/21
1. Dean back with us.
2. First month of next season, Dean play most of the games with Romero back-ups.
3. De Gea given one month holiday (justification? = De Gea need a "break" to get back his normal form, maybe Ole can mention the break given to Schmeichel by SAF)
4. If Dean convinces, stay and keep his place.
5. If Dean is shaky and terrible ala Foster, we may need De Gea back if we're really serious in winning trophies and doing better next season.
6. Scenario #4 would meant De Gea can start fishing for new clubs and go away the earliest Jan 21'.
7. Scenario #5 meant we may need to loan back Dean (if still can) to get more exps.
Either scenario, we lose nothing.
The break may even jog De Gea to get back his "
normal" form with almost zero mistakes every game.
Done!
Easy.