So, again, I'll ask: why do you think the show isn't much like the original? Tone? The action sequences?
Well if you're truly interested, as opposed to just looking for an argument, I will be glad to expand. You politely asked, and I'll politely respond. Again this about what's DIFFERENT, not about what's good or bad.
First of all, it starts with McGarrett. Jack Lord's Steve was very much by the book, he would NEVER dangle somebody off a building or torture them as seen this week. Steve was much more of a professional police officer than in this newer version.
Then there comes the relationship between Steve and Danny, or the whole team for that matter. It's just totally different, there's definitely more respect, just a more civil way of interacting with each other in the original than in this new version. Actually I think it's this relationship difference that I find the most different, and the thing I struggle with the most.
I don't recall if in the original if Chin Ho had a cloud hanging over him or not, I don't believe he did, but I can't be 100% on that. My best recollection is that he was just another straight laced officer who went to work for Steve. But other than that, I actually feel like the new Chin Ho most closely resembles his past counterpart.
Finally Kono. The original Kono was portrayed by Zulu, an actual native born big burly Hawaiian male, again another established police officer. You have to admit the way they cast this new character was quite a departure from that. No one will mistake Grace Park for Zulu.
Those are the things that jump out at me as "bearing no resemblance" from one show to the next.