i would not kill pike, for one..... ok, clarke goes to the col, and the killswitch scene, but alie tells her she could be with lexa in col forever instead of the meltdown whateverthatwassupposttobe........ or maybe even bring the real concence of lexa in the room, to talk to clarke.... and then clarke pulls the lever(again) and saves her people(again), and then yes, those scenes with hugging and all, and maybe blake siblings hug or smalltalk, instead of o going full deadpool on pike..... then maybe someone says what now and then the big cliffhanger...(YES, I KNOW, IMPOSSIBLE, BUT FLOAT YOU, THATS WHAT I WOULD DO)
the final scene i would show lexa being resurected, bringing her back to life...... maybe some new villain having her, and maybe a talk between two of the new villains, saying how they copied the chip of alie 2.0 when clarke was in col and they could acces it via alie 1.0 or some bullshit of a dialogue and then they put the chip in lexa and she wakes up........