I personally played her in Kaalia(the only way) and i never saw problems. Like i would name one color and sometimes shut off one opponent but i still had 2 to deal with. To this day i think the ban was unnecessary even more so on today's age where removal has increased. Now you have stuff like Farewell and the black version that just shits on your board regardless of how set up you are. The only people that complain about Iona are the mono color players, which is reasonable but my response is play better amd smarter, Iona aint some unbeatable entity or an "I win" card its more of a lighting rod unless the player that you shot down was being a nuisance or you politicking well.