It would be great if one could right away bond the rewards to compound it during expansion rather than claiming and again bonding it.
Certainly could save up on gas by making it just one transaction instead of two.
Same goes for the staking rewards too need to settle and withdraw and again add them.
Only a certain percentage of the rewards can be claimed and the remaining are vested for certain number of epochs. This would reduce the significant dumps that happen as soon as the seigniorage rewards are claimed.