I just checked with my husband about this, because he is our logistics expert for WDW trips. I recalled that one time, my daughter and I had a reservation at Garden Grill, while my husband, brother, and nephew were eating at Via Napoli. You just need different people who are park or resort guests to be the "manager" of each reservation. My husband says that this also works for two tables at the same restaurant, as long as two different people can be in charge of each table. We looked into that once when our family trip included honeymooners.
As for the scenery at Garden Grill, I enjoy it--child at heart.