Idea/Concept -Momentum based champion and random other....

I just had this great idea for a new melee champion. What if we had a melee champion who used a weapon (I'm thinking a greatsword) that is overly large and unwieldy (2+ hand widths and 2+arm lengths), and when this champion attacked the "balance" of the weapon was a key element of there play pattern?

For example, most of there abilities would be arcs/circular slashes that can combo/flow together but if you stop (or miss a timing window) would cause a self-root or other form of cc. Perhaps the ult would be a thrust movement (most vulnerable but also most damage). These abilities would need a range comparable to the blade similar to darius axe (inner area does little/no damage and blade area does majority). There would aslo be some form of fatique/stamina mechanic (bar perhaps like rumble overheat) where upon using too many abilities in a certain time period would cause inability to attack etc.

I think a lot of people would enjoy such a champion (and even if the damage is "insane" would have good counterplay) especially if one looks at the success of something like dark souls (and how much many pros enjoy that game). I would put this champion as a carry bruiser but could easily shift towards assassin.

Let me know you thoughts.

Random other concept: Horse mounted champion (archer/marksman?) that's damage is entirely based on movement speed with some form of ammo system (maybe just 1 or 2 shots) whose all their abilities are movement based. (Some kind of passive/ability of X movespeed allows auto jumping walls)