Pro-tip #1 Rhythm is really the key to consistency. And consistency is what separates good players from great players. A consistent season makes an all-star; a consistent career makes a legend.
Pro-tip #2 Some players do feel more comfortable with a level 8 grip on their swings. But that is rare. However if you feel that 7.5 is too lose, feel free to experiment. Some players get very precise in doing this: some like a 7.7 on their swings. You will know what is best for you through trial and error.