Hey there, I think you're spot on! Other than hit detection that's most discussed in our community forums for now, I also do feel like a proper main attack series of multiple consecutive attacks with no lag in between is probably the thing the game needs the most for a proper rhythm! Also an idea to make AoE more slow and powerful is something we could test, now they take about the same amount of time and AoE just pays for its extended area with lower damage.
Thanks for giving us a try and specifically thanks for your goodwill and understanding regarding the jam conditions! We will release a patch when the voting is closed on a jam to avoid people rating a more polished game than we could honestly make in the timeframe we were given.