Let me start with this. It is not something that you want to happen on a cruise and that's deal with Norwalk or whatever it was. It takes away relaxation time and fun for sure.
Even I knew that the Boarding of this ship would be late about a week before the sailing and I sure wasn't sailing on her... I would blame the TA or who you booked with for not advising you. If you booked with the cruise line I agree ..not good. Options were given to all those booked in the days before this cruise and included info on the delays.
I have sailed on a Noro cruise with Celebrity and all those things like no salt/things on the table, etc. that are usually shared being removed are normal precautions on all cruise lines. If you make staff do all those extra things for you then to maintain the actual service you need more staff. They are not able to come up with more staff so yes service will go down. We supplied ourselves with the wee packets of salt etc and took them to dinner with us.
Persons being ill in the dining room is not a great situation. Why were they there if they were ill.?
Not to make light of your concerns but Cruise Lines (in this case Celebrity) have little control over passengers and how they react to such situations.
Lots of people that I know were not happy with the buffet set up without trays on the Solstice...I guess you are just another. But for your info there are never any trays on a S class ship. I personally like their new set up and had no difficulties at all getting my share of food to a table. Except for boarding day when I found the buffet too crowded period. M class ships retain their trays. (so far)
Most important you left out whether or not you were able to cruise without getting ill. Did that system work for you ? Were you able to get through the cruise without illness?
It's clear you came to share your thoughts and they are all negative in your two first posts. Please come back and participate in our forums on this and other matters in the future. I am hopeful that should you cruise again things go better and you. Come back and inform us of what happens.