Your description of the creeping issue is correct. But your solution is wrong since the issue is the current imbalance between the speed stat and the other stats, not character mechanics.
Nominal speed stats is daft stupid from day one, it wrecks any speed/damage normalisation made at character design level. In addition to that speed has a multiplier effect on everything: damage, recovery rate, special ability rate, proc rate... In the end speed completely outweigh every other mod stats. So the solution is simple, either replace nominal speed by % speed or boost every other stats to become as competitive as speed currently is.
