S.Y.
My second child is 10 1/2 mos old, and I am going through roughly the same business. She also seems to be eating less and playing more, I read somewhere that they turn into "tiny scientists" at the table, finding the answers to such questions as "What will happen if I drop this?" and "Does oatmeal or sweet potatoes feel better when mashed into my hair?"
If he likes finger food and you're concerned about getting fruits and veggies in him, can you give him fruits and veggies as finger food? My girl loves banana spears (cut off a few inches of banana, then cut it lengthwise into 3 or 4 spears, they're good for biting), and you could also do potato or sweet potato cubes, peas, carrots, etc.
With my son, we made sure to give him some finger food at the same time that we were spoon-feeding him, to keep those hands busy. Now that we have two mess-makers (he just turned 3 this week), I took the rug out of the dining room because I was tired of worrying about the spilled milk and glumps of baby food.
If he's taking 32 oz of milk, he should be fine. He's old enough to let you know if he's hungry, and his hunger will change day-by-day. Don't worry, just give him more options.