I really enjoyed watching 'little women'.
I was hooked from the first episode and watched until the end as the story was interesting, several of my favourite actresses were in it and I liked the general vibe.
It was mysterious with all the orchid business, you could easily empathise with the three sisters, with some more and some less though - and tension built up nicely for the final episodes. There where some storyline weaknesses before but I was able to ignore them, sadly not so in the final episode.
So whatever happened then? Was this another drama that was short cut from 16 to 12 episodes? Was there not enough time left to write a good final episode?
This final episode had severe logic weaknesses and they were just left unsolved to give the show some kind of happy end.
So what bothered me was:

1. So what was all that satisfactory scene when reporter Oh In-Kyung could finally prove that Won Sang-A is a devilsih murderder? She has CCTV matierial showing Won Sang-A brutally mudering a person. And after that? No police goes immediately to arrest Won Sang-A, instead she can joyfully go to the hospital and kill that old man who gave her away, in front of a nurse witnessing this? Still no police. Time passes and she then has time to stage all that final scene under the orchid tree in her cellar. Still no one arresting her while the incriminating material of her being a murderer was on live TV probably two days earlier?
So she can manage to abduct Jin Hwa-Young, and lure Oh In-joo into that cellar too, still no police at her house arresting her?
That was so nonsensical and made that reporting and proof of Oh In Kyung totally useless.

2. So Won Sang-A then had enough time to prepare the sprinklers with acid. Ok. So she turns on the sprinklers and the acid dircetly hits Jin Hwa-Young being bound to that chair, and the pure acid drops hit her for quite some time, she is screaming on and on, but nothing really happens to her, she is not really hurt by the pure acid drops.
Then in a twist of actions Won Sang-A falls into the pond under the orchid tree and - suddenly burns completely in huge blisters from the acid? How?
If the pure drops of acid did not harm Jin Hwa-Young for quite some time, why would the water, only containing a few drops of acid totally burn Won Sang-A if she falls in there?
That was even more nonsensical as nothing would have happened to Won Sang-A falling into that pond, it would just have been water with acid so thinned out that nothing would have happened to her.

3. I'm always in for a happy end but also that was questionable. So the youngest sister gives a lot of money to her older sisters out of gratitude. That is a nice gesture and I would have loved to just see it as that.
But, Oh In-Joo was just convicted with serious money matters and is on probation for the next years. Does anyone really think the authorities would not check on her if she suddenly had 23 million Dollars in her account? No way would they have left her untouched and the whole trouble would have begun again, her youngest sister then being a suspect and internationally sought for.
Also the two young girls were travelling with their real passports and real names, it would be very easy to track them down as long as they wouldn't have fake identities. (and they didn't as Park Hyo-rin needed to use her real name to achive all that money at her becoming aif age)

4. And what happened to Go Su-Im? Is she also still roaming free? If so, wouldn't she try to harm the three sisters still?

I found this to be such a good show until this final episode which seemed hushed and not thought through. The focus was on creating this final scene under the orchid tree without considering the rest of the before given circumstances and the fact that Won Sang-A would never have had the chance to do all that because shortly after the live TV airing of her mudering someone the police would have taken her.

So, this annoyed me so much that my rating weng down from 8,5 to 7.0.
I wish the producers of the dramas could manage to not hush the last episode and storyline like that (and it's not the first time this is happening) for the sake of logic and common sense that totally goes overboard in this final episode here.