I don’t think it’s really polarising because some have it vs some don’t, but moreso that the ttk is so low that barriers, esp high uptime spammable ones like rein’s, become so important to have unless you’re running a hyperaggressive dive comp.
like if ttk wasn’t so low, supports can be balanced to be less heal bots and having 2 offtanks as the tank combo wouldn’t be all that bad. just like in paladins tbh.
but unlike paladins, there’s no global mechanic to deal with heal spam and shield spam in OW. well… there partially is with 2-2-2, but if damage is lowered for higher ttk, then 2 main healers and/or 2 barriers will be a problem again. hence a conundrum in OW. ultimately ttk needs to go back up while still having mechanics that are very available (i.e. not just to a very limited number of heroes) to shield break or prevent main healer spam.