I liked old akali waaaay more than the new one. Her design was basic, but still very good. Her gameplay surrounded a certain concept, fun.
The new one, yes the new shroud is amazing, but the rest is very... odd. Instead of an assassin who instantly pursues and kills their targets, she is now more of a hit and run champion. The energy bar (which they used for zed) was interesting, but by the fact it depletes so fast with your q and e, and by the fact you HAVE to use your w to get a lot faster is just odd. Her ult is another hit and run tactic also, you dash in, you dash out, simple.
Also for a subnote doesn't anyone else thing old akali looked like someone from Mortal Kombat? I think so and that is one of the many reasons why I liked her old design more.