French route advice for Calais to Gstaad (Switzerland) trip

I have planned a 6 day cycle from Calais to Gstaad for late August. If you know the area/roads could you let me know if you think there are any problems with the route I have chosen (or if there's any great lunch stops en-route!). I know local knowledge is always invaluable! My bike is a road bike so apart from the odd short trail it needs to be onroad. I have already booked the accommodation so I can't change the end of day stops but I could amend the route slightly to avoid a nasty road etc;

Full route is viewable at: https://ridewithgps.com/routes/47716558 Summary is:

Day 1 – Calais to Peronne

• Lumbres
• Saint-Pol-Sur-Ternoise
• Miraumont

Day 2 – Peronne to Fere-en-Tardenois

• Hombleux
• Noyon
• Ambleny

Day 3 Fere-en-Tardenois to Chamouilley

• Damery
• Chalons-en-Champagne
• Frignicourt
• Saint-Dizier

Day 4 Chamouilley to St.Maurice-sur-Vingeanne

• Joinville
• Foulain
• Langres
• Cusey

Day 5 St.Maurice-sur-Vingeanne to Vaux-et-Chantegrue

• Nantilly
• Valay
• Arc-et-Senans
• Censeau

Day 6 Vaux-et-Chantegrue to Gstaad

• Jougne
• Ballaigues (Suisse onwards)
• Orbe
• Saint-Martin
• Gruyeres
• Rougemont

Thanks in advance for any comments, help or advice!