{For context I read up through Odd Numbers Pt. 2}
In short, I do think that it has potential, here are my thoughts:
The art I like quite a lot. As others have said already in this thread there are definitely areas that it can and will continue to improve, but it's a cool style and I like that it's not afraid to flaunt background shots here and there as well.
The story so far is my biggest criticism- Although I'm all for fast paced stories (and generally prefer too fast to too slow), I think your story is moving way way way too fast for its own good. Ignoring the Prologue (which was fine and I'm sure will have its tie in later on), as soon as we get to the part with the twins the plot kicks into hyper drive and doesn't let off the gas, so to speak. I counted and I think there's like... 17 panels? between when we are introduced to the main characters for the first time and when they're suddenly at the site of some large tournament, and in a number of panels after that we're briefly introduced to 4 more characters, and then an episode or 2 later some dude gets casually blown up, now a few episodes later we're in a fight against some other rando. Tournament arcs are actually one of my favorite story telling elements
(
heh)
But I haven't been able to wrap my head around or get invested in this one because it's just so sudden. 7 episodes in I know next to nothing about the two main characters aside from their names, have no idea what this world is like, and know the bare minimum about what the tournament is even for (A- Class fighters only, some sort of test to join... a prestigious group or something? Occurs every 10 years), and also have had several other characters thrown my way with similar amounts of introduction and characterization as the main characters (which is to say, not much). This first fight between... gray cloak girl and spikey hair guy... doesn't have the impact that it feels like it should because the stakes and motivations are unclear. I guess there's the "fight to the death" aspect, but I don't know or care enough about either of these characters to be invested in the outcome really. Gray Cloak girl could die and I wouldn't even remember her name at this point.
Now, that's absolutely not to say I think the story is bad- it just lacks the context to be meaningful at this point. Moving forward I would be careful about rushing into things without the proper build up, basically. All in all just scrolling through these action scenes is entertaining in the same way that it can be fun to watch a random battle from an anime that you've never heard of just for the heck of it due to the fun art and choreography, but the story is difficult to follow currently.
I'll briefly touch on the dialogue. It feels really unnatural and kind of awkward in parts. I think some of this has to do with the above pacing issue though. For example right when the tournament's about to get started in Trials Pt. 2 & 3 you have this long string of interspersed introductions:
Then some back story on the scary guy
then by the end of the sequence you have this girl just randomly dropping into the conversation out of nowhere and dropping her name at the end
Just like @Cavechan said, it's not disruptive enough to actively take me out of the story, but just unnatural enough to feel strange. It's then compounded by this sequence shortly thereafter where everyone makes sure to give their own internal monologue on how much of the attack they were able to glimpse:
and so on.
It feels like a way to try and quickly set up character power levels relative to one another without taking the time to actually develop them and just reads a little awkwardly.
Overall I think you have a solid base to work from though! The things I've talked about above are all just the sorts of things you'll get better at with practice keep it up!