the menavlion was nerfed for different reasons. I feel like its in a decent spot now.
1, Its high damage, could do way too much dmg compared to other weapons like 1h etc.
2. It had far too much range so people could just run in circles and avoid all the fight.
3. It was far better than its counterparts (heavy, long) Picking the heavy or the long version barely gave you any benefits before, but now they all feel more distinct.
4. other units and not just the shock infantry used it, so its a indirect nerf for them. On horseback it was pretty strong in casual play. It was far too strong on the palatine guard aswell. (it even needed to have an imperial polearm as placeholder for some time)
If you like the old menavlion feel i would recommend you to play the heavy one it hits still as strong as the old normal one. You are forced to sacrifice some armor for the extra dmg now.