2 very good points. Been too long for me to remember the seating arrangement at the table at the time of the poisoning but I seem to remember it was Codia at the head with Antonio and Isabel on her left with Luna, MC and Gracie on Cordia's right. Could have been MC at the end opposite Cordia and Luna and Gracie on Cordia's right. Anyway the most obvious suspect would be whoever was sitting closest to MC which would not be Antonio.
From my memory, to Cordia's left sat in the order of Antonio, Isabel, then Gracie. To Cordia's right sat Luna, then MC.
Only person sitting closest to MC was Luna, but we all know that's just not her style.
To be honest, I don't think anyone who was present at the table for dinner is a suspect. Which makes me suspect Wilfred (who calls MC, but is not actually present at the dinner itself).
I'm just gettting the feeling he poisoned the MC not to actually kill him, but to test how immune he actually is to poison (part of his research on MC, to see his resilience & potential, even though it does sound twisted lol).
And besides, like he pulled strings (behind the scenes) with the whole Fazio Family matter (which he argues with Cordia a bit), it wouldn't be the first time he did something behind Cordia's back either.