Best Skeleton for a Tactical FPS in UE5: Should I stick to UE4 or UE5 Rig?

Hey everyone,

I'm developing a tactical multiplayer FPS in UE5 (with a similar vibe to SCP: 5K). I’m using a local FP Arms mesh for the viewmodel, and a full TP mesh for multiplayer replication.

Right now, I'm kinda conflicted. Most of the games I have seen use the UE4 rig, but I want to leverage UE5’s advanced features (like Distance Matching, Motion Warping, etc.) for the third-person locomotion.

If I have to unify everything under a single rig base for the entire project, which one should I choose and why? Is the UE5 rig really that bad for first-person weapon animations, or is the UE4 rig too outdated for modern UE5 features?

I would love to hear your thoughts and experiences. Thanks!