"...I personally believe that Spruance and Mitscher made a much better combo than Halsey and Mitscher..."
Given how Mitscher royally screwed the pooch numerous times at Midway(1)--right in front of Spruance aboard Enterprise--it's no surprise that Spruance kept Mitscher on a short leash at the Philippine Sea.
"...To send the planes in the first place, was the big gamble..."
Quite a few planes beyond the 216 launched were scrubbed from the mission; however, putting the Japanese carriers away was considered a fair price. The planes could be replaced, of course (and quickly); and while crews could be replaced as well(2), Mitscher had a fondness for his men (apparently he was quite shaken by the loss of Waldron at Midway).(1)
(1) See: Cressman, et. al., A Glorious Day in Our History and Lundstrom, Black Shoe Carrier Admiral.
(2) See: Dickson, The Battle of the Philippine Sea.