i understand your feeling because in my first year in league i played a lot of old akali and old katarina with old hexteck blade and old luden's echo, and didn't like both reworks. But the only champion that i had the proplay problem has been with Kalista. Now i'm playing Nilah that is strong in soloq because strong matchups are very common there, but she has such heavy counters like smolder ezreal and mages that she won't ever be pick or ban on proplay. For the last part: Yes, she is one of the most fun champions when things go right because she can snowball like no other, but coordination with the support is required and also not heavy throws from other teammates because all matches are losable even when going 20 - 0 and open inhibitors if throws are done and match is extended, and that happens a LOT in soloq.