Your experience may differ, but I found cycle touring in NL boring as hell - too flat and the cycle lanes (which you have to use) can be a pain, although they're obviously very safe.
It's more that I want to ease my other half in who is relatively new to riding. This is why I'd rather skip the London > Coast sections because I know what the traffic is like and how much nicer it is on the other side of the channel but you are most likely right! Need a few lumps and bumps.
Your experience may differ, but I found cycle touring in NL boring as hell - too flat and the cycle lanes (which you have to use) can be a pain, although they're obviously very safe.