Arion is no longer a staking coin it is only mining and masternodes
A new code was needed to eliminate the errors found in the previous wallet. Velocity proved problematic in its choices on whether to reward stakers or masternodes. Mining was also increasingly difficult and would often leave the machines spinning their wheels and earning nothing.
The new version has a more stable base in the code and has removed staking allowing mining and masternodes to remain. The velocity has been removed and better staking rewards added.