Personally I dont think Eurostar will ever serve the Kent stations again. Eurostar have let their market share slip away and it wont be easy to regain. Given the extortionate Kent fares its just uncompetitive much easier to drive via Le shuttle to anywhere but Gare de Nord. Brussels is 170 miles from Ashford, Lille 120.
Its rumoured that KLM will be restarting its shuttle service from Manston to Schipol in2025 much easier than the cross London Faff to Heathrow.
A bit rubbish if you want to go from Kent to the Continent.
Why is it even Eurostar's decision ? Surely stops in Kent should be part of their licensing agreement.