OK, just the facts about chansey:
Pros:
..Great Defensive Stats: at max hp/max Def with eviolite se has 704/179/369 (better SpD that Last gen leftover Chansey with all in SpD and way better Def)
..Good Defensive Typing: only one weeknees
..Reliable Recovery: Sofboiled and newly boosted Wishes
..Great supporting movepool: Heal Bell/Aromaterapy, Safeguard, Toxic, T-wave, Stealth Rock, every weather and even sing for sleep, and snatch for set-up sweepers
..She is Cute: she is :3
..She can take strong unboosted/unSTABed SE hits: CC from Banded arcanine is about 72%-84%, FB from SpecsZam is 36%-41%
..She doesn't care about status: Natural cure (as long as T-spikes are out of the field)
..She is NOT alone: Slowbro, Dusclops and Roserade are great companions for Chansey and many pokes can help her to take her weeknesses
..She works outside of stall: Not a common argument but many seem to think that she is only good in stall, well, any sweeper will gladly take those 302 whishes, and most of them will be relieved to have their status removed
..She can easily swich: Unless you Pursuit, she easily swiches out into something she can't take, and unlike swepeers that doesn't make her job harder
..She is a Defensive treath: She does he job is something gets healed, she does her job is something gets paralized/intoxicated, she does her job if your pokes get rid of status, she doesn't want to eliminate your pokes, she might, but that's NOT her job
Plops:
..She LOOOVES her eviolite: without it, it's just like Romeo and Juliet, one goes and the other dies shortly after... (trick, knock off, switcheroo, etc...), too much item dependant
..She's afraid of ghosts: Any good ghost can use her as a set-up fodder by just using a sub (Since ST is her only attack)
..She doesn't like 101 subs: and specially pokes with subs and the possibility of Boost themselves
..She is fairly predictable: Outside of Toxic vs T-wave you don't need to be a phyquic to know what moves she's using
..4MSS: if she wants to wish she needs protect, if she doesn't want to be taunt bait she needs ST, if she wants to status she has to chose between Toxic vs T-wave, then she can´t use Heal Bell without getting rid of one of her moves, if she wants to be different (like use SR or weather) then she has to get rid of more moves
..Taunt: yeah, she doesn't have a way to avoid being taunted so she easily become a set-up fodder to powerful pokes with taunt, and lets her be set-up fodder to any pokes with reliable recovery or something like it
..Enormous HP: WHAT!? how can this be bad?, well, it is bad when you have a boosted Drain Punch from pokes that have a way to boost themselves, the same with Leech seed and to a lesser extent Giga Drain that can heal your foe pokes to their full, not really an enormous con but something should be considered
And again, i don't think she is broken nor say she is not, just pointing out the facts about her, i think if she is broken she should go, BUT i'm against a complex ban like Eviolite + Chansey, if she is the only broken poke in UU with eviolite the so be it and ban the little pink blob, NOT the item+her
..