Is carmilla still viable?

Im a player that returned after playing on and off for awhile, used to play 'mm baby-sitter' roam but now i mostly play mid/exp

Was recently forced to pick roam (cuz i boosted a suyou to s1 and ended up being s5) and decided to play carmilla again because i remember her being fun to play. But i was shocked by how different she feels to play now.

The ult is a big AOE circle w delay? What happened to the lock on shot? Why'd they get rid of it?? S2 speed boost feels like it decays so much faster? S1 rotation feels rlly slow now?

Any tips on when and how should i play her nowadays? I dont want to go silver again and feel like im feeding :(