Breakdown of El diseño visual es genial; ahora bien, el reparto necesita mejorar.
ser
to be
necesitar
to need
mejorar
to improve
genial
great / awesome
Questions & Answers about El diseño visual es genial; ahora bien, el reparto necesita mejorar.
Why use ahora bien here instead of just pero?
Ahora bien is an argumentative contrast connector. While pero just links two contrasting ideas, ahora bien acts more like "having said that" or "however." It accepts the first statement as true (the design is great), but introduces a strong restriction or new perspective that alters the overall conclusion (the cast needs work).
Notice the punctuation around ahora bien. Is the semicolon and comma required?
Yes. When linking two complete phrases in the same sentence, multi-word connectors like ahora bien and no obstante are typically preceded by a semicolon (or a period) and followed by a comma.
Does reparto always mean "cast"?
Why use the infinitive mejorar instead of the subjunctive here?
Because there is no change of subject. The cast (el reparto) is both the entity that "needs" and the entity that will "improve." If the subject changed—for example, if the director needed the cast to improve—you would use que and the subjunctive: El director necesita que el reparto mejore.