>>1011717
>>1011732
since you're a maxbro and you asked nicely, 3ds max have the exact tool for this. its called flow connect. just delete the whole loop, select the ring of the original loop, and click flow connect. it will automatically create a smooth loop based on the surrounding curvature.

and yes, i've check, there's no other tools similar to this on blender or maya.

3dsmax gods stay winning.