Hi, thats only my personal opinion but i want to share it with all of you so maybe i found some people agree (or not) and open a little deabatable idea (please stay away if your intentions are trolling or just blame along this thread).
The main thing is i feel plate armor tanks are not working as intended. I mean, the damage absortion provided by plates are being considered as an advantage or defensive extra who other tanks doesnt have, when its really not true.
Obviously it provides some armor=extra absortion to physical attacks, but other tanks have another ways to compensate it and them results more effective.
Thats why i feel plate tanks are in general more weak than leather tanks this exp.
BD = big hp pool, low mobility, big heals but big intaken damage who causes pug healers a headache cuz its hard to know when they really needs big heals or can heal themselves (specially if u dont know the class), making them hard to heal when out of cd and very undesiderable tanks if u go +10 keys.
Paladin = low hp pool, low mobility, big damage, big heals and high intake damage overall, making them gods for low keys but suffering on high ones cuz they cant kite properly or heale themselves enought fast.
Warriors = low hp pool, low damage, low intske damage during cd but squishy as other plate tanks when SB or IP are on cd or not rage, and he doesnt heal.
Leather tanks maybe have lesser armor mitigations, but this is hard countered by hp pools (in some cases), mitigations CD, extra mobility and the capacity of selfheals.
In my opinion all tanks should have lesser selfhealth and let healers do the work they love, this would be a hard nerf to DK and Paly, so for this reason, plates should provider more mitigation damage to compensate this. Maybe increase some anti magical cd to all tanks in compensation too.
*Sorry, english is not my 1st lenguaje.