PTA doesn't need any changes Fleet Footwork just needs to get nerfed
Riot reworked Warlord's Bloodlust when it had 20% lifesteal because it turned trades in bot lane into meaningless excursions because champions could heal back all the damage from minions... current Fleet Footwork is actually no different despite the 60% healing from minions clause.
It has amazing synergy with items, other runes like taste of blood or ravenous hunter or celerity, and just gives way too much healing with no meaningful sacrifice being made in terms of itemization. I haven't even begun to mention the free mobility it gives so that alone tells you how overloaded this rune is, it should be nerfed just for the healing alone.