Yes, very much! I'm amazed that they are still using upgraded versions of the UH-1 Heuy and the Cobra gunship! The basic designs are now ~40 years old, and surely there are better options around now (Blackhawk & Apache, for example).
The new ones are more expensive, and AFAIK HueyCobra can carry weapons that Apache can't - Maverick for one. I don't think AH-64 has been cleared for AGM-65 carriage and launch (IIRC that only AH-1 and Kiwi Seasprites are the only helicopters that carry Mavs). Plus Apache isn't navalised...
I remember reading an article on the UH60 which put its operating costs at just over $1,000/operating hour while the UH1 was IIRC around $350/operating hour.