Depending on how picky you are the issues with the AH-1W may not be "that great" but they are many and noticeable. Look at the thread in the link I posted above. Aside from that short fuselage, some of the most noticeable (IMHO) off the top of my head are the canopy sills are too low, canopy shape wrong, slope of forward doghouse, three missing firewalls/bulkheads, no panel or rivet detail on the belly, xmsn cowling, exhaust cowling, little/no detail on the inside engine doors, ammo bay doors, main rotor hub, tail rotor 90 degree gearbox, rocket pods, tow missiles, etc, etc.
As a comparison between the quality of MRC AH-1W and their later efforts, look at the ALQ-144 and Hellfire missiles on the AH-1W kit compared to those on their later OH-58. Same components real life but the W kit parts almost look cartoonish compared to the OH-58 kit's.
Does it look like an AH-1W when built OOB? Yeah but the AH-1W is pretty distinctive. There are a lot of after-market correction/detail sets for the AH-1W. Why? Because a lot of people have noticed the problems.