No the ACA was not perfect and needed adjustment.  It was the result of trying to please too many factions, including the insurance companies.  You say 'repeal and replace' but the fact is, Republicans will not 'replace'.  They had decades to put a plan in place before this one, and fought mightily to prevent it.  They only gave in when a piece to enrich insurance companies was included.  Now the insurance companies are screaming poverty.