Agree 100%. Key defensive abilities such as some morales (for instace tank m4, tank m3 & mdps m1) on low cooldown and especially guard turns the whole war 6vs6 into "punt the tank in 5-4-3-2-1" repetitive snoozefest but it is what it is. At least they managed to make tank role relevant in pvp in war which has its pros as well.
And imho it's cool that there is game mode for ranked enjoyers. Rest of the people are not forced to play it and can play the orvr or whatever else they want instead (especially now that you are not forced to play ranked for triumph ring) so there's really no downside. Personally, I'm spoiled by WoW arena nowdays (big playerbase, scene & better mechanics) so I'll probably pass but that being said, best of luck with the ranked, hopefully you get it popping somewhat consistently. Although what CyunUnderis said is very true: go ranked discord so you are on same page than rest of your team and if you are low gear (vanq etc), people will quickly identify that you are squishy and will kill you repeatedly and your teammates will hate you for it so it's better to bring character which is best in slot.