My thoughts on new fiora
I was never a fiora main but I played her quite a lot over t he last few years. I decided to give her new rework a shot. I played her in a bot game to get the feel of her and then in 3 normal games.
Lets start with her lane phase. I feel like this is quite strong and stronger then her previous state. Its most importantly a lot of fun. As others said its really a feeling like your dueling the champion and RIOT captured this quite well. You look for marks from you passive and try to exploit them for some quick burst damage followed by your E. The use of riposite is a lot of fun now as well. You can block any spell with it from a darius ult to an auto attack so timing this is essential and adds to her dueling nature
Moving on to team fights. Before if I was 4-1 on fiora with good cs my ult could change a team fight even if the team was behind. It still has that potenitla but is much harder in my experience as you need to kill the target or knock off all of 4 vulnverabulity spots in a fairly short amount of time. However if you do this it results in an enormous aoe heal that is really powerful. Now that being said I find team fighting with her difficult. You can't just jump in and eliminate their adc as before and u are vulerbale to focus fire as people still focus you obviously. I am trying to figure out her role and split pushing seems to be it as she excels in 1v1 and 2v2 situations but in 5v5 your team cant really afford normally for you to play cleanup and even if so your not as good as it as champs like yi. For split pushing jax,atrox, tryn are all better.
TLDR - New fiora is fun a great duelist that is rewarding , her laning phase is strong but her lack of team fighting ability while not really excelling as well as other as a split pusher leaves her in an awkard spot.