In my opinion, that and $3 USD will get you a Starbucks latte, it wuz much better. Harpoon 3.0*, which was the available version then, had no real ECM/ECCM rules but WSC2 did and they worked. The sub and sonar rules (Sea Commander) worked much better also.
It's true the WSC2 was awkwardly written. I turned the chit system to percentages.
Now compare WSC2 (and SC) to Harpoon 4.0 or 4.1 and WSC2 is a breezily clear set unlike the complex, turgidly written, complicated H4.X that most people just give up playing.
Was WSC2/SC1 absolutely accurate and true to life? I'm sure they weren't. Could you play the airstrike on … Nimitz(?) in Red Storm Rising? Absolutely.
Can you with H4x? Perhaps expert Harpoon gamers can but most will give up. While I've not played in any of the Admiralty games at wargame conventions for several years the ones I did had noticeable handwaving to get the game to finish i.e. what we played wasn't in H4 rules.
I doubt H4.2 will see print, it's years beyond release date and H5 is a pipe dream IMO.
More complicated does not mean more accurate although I do collect all the various H4x editions and supplements. I've also got all (I think) H3 supplements and H2 Resolution 502.
Because I'm a masochist
My favorite is Troubled Waters.
*I believe the only differences between H1,2, and 3 was that the Starship Enterprise was removed from the altitude chart/drawing and 3.0 had better production values. Enterprise is back in 4.X