i dunno u compare Morg to other Mid mages.. Lux's passive works for her kit... ziggs work for easier last hitting and is reduced the more of his kit he cycles thru... Vel gains True damage upon hitting 3 stacks... malz gives him better ability to be able to stay in a fight a second longer to be able to lay down damage from the temp shield... the list goes on.. morgs passive is weak now... it wasnt even noticeable really when it was at 30%... then they reduced it to 20% and then nerf back the soil so it doesnt MR shred but then slightly buff soil to proc damage every .5 opposed to every second..
but she need a tweak in the passive area.. they gutted her in the area of even tryin to build to enhance it.. the only item for that is spirit Visage... and even then u cant notice it..
If they are tryin to move her into a more support role fine.. then make her passive reflect that somehow.. even if its something like allies gain enhanced damage on Stunned or snared target from Morg.. would this make her OP?? i dont think so.. cause she still has to land the Q and also still has to be in the AOE for the stun..