One of the unique things about magi is that when hashrate goes up, PoW rewards go down. Going static rewards for PoW would lead to higher hashrates at all times of the day. This would lead to higher energy consumption to maintain the network, while one of the goals of this coin is to have as energy efficient of a network as possible.
The problem with going static rewards for PoS would be that sizing blocks would be extremely important. This would be hard for new users to compete with people who are more staking experts. One advantage to how staking currently works is that casual users can get normal sized transactions through normal use and they will occasional get stakes. If there was a better use case for the coin casual users would be able to get stakes. I personally like how magi stakes, but I just want all of the dust rewards to add up to something slightly more.
regarding pos adjust coin pilesize with the new conf parameter is easy works great create a zero micromanagemdnt required pos enviroment
regarding pow there is ways utilize the less rewards with to high hashrate even with static base blockreward
so similar as now less rewards at to high hashrate and a bit more if to much
but with adjusted diff adjustion with less ways to abuse it
and with a much lower max pow reward
so it should be in area 2 - 10 xmg with the clear aim of diff engjne to reach a average value of 5