I think there could be a case for change. Maybe to make the comics more accessible or to reflect current artistic trends. But it should be done carefully to not lose the essence of what makes them unique.
It depends. Some might say yes to attract new audiences or keep up with evolving tastes. Others might think the existing style is part of their charm and identity.
Not necessarily. The current art style of American comics has its loyal fan base and has been successful for a long time. However, a gradual evolution or experimentation could be interesting if done right.