Just wanted to update...
When I received my computer back in February I did order a special screwdriver and opened the machine. Could not see any "trace" of liquid damage just dust on the back bottom ... Closed my computer and continue working with it and there was no any functional issues.
Last week, my workload was more reduced so I decided to try again hoping Apple will replace my screen, since the delamination problem was extending and the replacement program is ending next October. This time, instead of going to the Apple store close to my workplace, I went to another store which is bigger (not sure If I can name the stores here). The genius run some tests to see if the machine had hardware issues (something they haven't done the first time) he also saw the comment from the previous genius of the other store, probably kept on file and linked to the serial number of the machine, and he took the computer with him in the back room. I guess they opened the computer and looked for the "water damage"?
Anyway he came back saying the screen replacement will be free of charge under the program and will take 3 to 5 days. No mention of water damage ...
this time, I could track the repair and see that the machine was sent to a repair store (it never happen with the other apple store) and 2 days after, I could pick it up with a brand new screen and upper case. Happy ending.
Now I'm wondering if the replaced the screen will also be prone to the delamination issue? what can we do to prevent that problem again ?