Generally, no. Do hard intervals and increase distance, and improve power.

Smoothen out your stroke on rollers - you'll gain maybe 2 watts on average, if even that. Often you'll actually lose power with the smoothness. Although your roadie paceline buddies will thank you for your fluid accelerations. (The guys in the crit race will also love you - and use you them dump you after eating your draft!)

Contrary to what folks think, it's really hard to lose significant power by intentionally pedaling less circle-like, as the pedal crank limits your motion. There are a lot of coaches including elite ones that say to just throw out the attention to pedalstroke and just focus on power and practice high cadences for when you need it. (They're not making you rush out to use the analytical spinscan feature on Computrainer which tells you the areas of your stroke that are putting out less force.)