Fioras new Ult looks a little too underwhelming

In looking at gameplay of the Reworked Fiora on the PBE, I found most changes to be actually spot on for a direction to take Fiora in other than a "Press R and hope to win" kind of champion, but the new ultimate seems to have the opposite effect on her, which is not necessarily a bad thing (see Jax), but the rest of her kit doesn't make up for it, and having a more exciting Ult seems more fitting for a Duelist ready to face down her opponent. (The next paragraph just explains why Fiora's Ult is lackluster, skip it if you don't need convincing)

Yes the really strong mass heal is a good and a needed defensive option for Fiora (now that her Ult doesn't make her invulnerable), but in terms of dueling (which I'm pretty sure she is supposed to do well) the Ult is lackluster due to its fairly difficult requirement of popping all of the passives to make use of its stronger effect (or killing the champ yes, but why would you need to ult if all your gonna do is kill them with your other abilities), it is also lackluster due to the lack of advantage you get when popping it on your enemy, you get four uses of your passive, Big Deal (albeit slightly stronger versions but still not enough). Its also doesn't seem to really have that sort of effect that Ultimate's usually have, like when you see a Maplhite or a Zed Ult, even something a subtle as a Nasus Ult still has that sort of "BIG PLAY COMING UP" kinda feel to it that does not exist when the new Fiora Ults. Not that it has to have that effect, but I think that her theme of a Duelist just begs for that sort of effect to happen when she Ults.

Today I just had an epiphany on how to make not only the Ult better overall, but I believe funner and more skillful to use. Instead of granting movement speed when around your targeted enemy champion, how about you get a reduced mana cost and a huge cooldown reduction on your Q (Lunge) when around your targeted champion (THIS IS KEY, ONLY AROUND TARGET). This effect would basically allow you to use your Q almost as much as Yasou's E so long as you stick around your target (I believe a little longer of a cooldown than Yasou's E would be best, maybe 1 second or so), and would not only make the Ult actually give you an advantage in the fight, but it would also solve the issue of having the passives being hard to pop, because now you have incredible mobility, but only when you are Dueling. I realize this might give too much damage to Fiora with the current numbers on her Q, but with a bit of tweaking I think this idea would not only be effective, but fun as hell to play as. Think of the plays you can make doe..

Anyways, I would love to hear your opinions on this change, whether you think this might be too strong and break the game, or maybe it is too weak. I think it would be just what Fiora needs to make this rework a complete success.