Hey there! You are right, a Ferulic acid rest would promote the creation of 4 vinyl guaiacol (clove) in fermentation. Also, a higher temperature in fermentation would promote the creation of isoamyl acetate (banana). In this case I wanted to test a "common and easy" mash and fermentation...
Yeah it's hard to hit the mark, mostly if it's by priming (harder with honey and exotic sugars). Definitely the best way to have same carb always is with CO2. Having a corney, a keezer and some CO2 is the next step for every home brewers!