5.0.16 release, contains only update of sigma-state dependency (https://github.com/ScorexFoundation/sigmastate-interpreter/releases/tag/v5.0.13) which is fixing serialization bug happened in previous version (fix: ScorexFoundation/sigmastate-interpreter#941).
Update for 5.0.15 to this version is mandatory for miners and recommended for others. Update from other version is not strictly needed.