the need for 3rd tank class

[lxSch]

Having a ranged tank would be nice (like the maelstorm commander with a pistol). Evasion could allow to avoid damage completely or receive a glancing blow, removing the need of high hp; and being a ranged class - high resistances for DoT/magic attacks.
I would gladly play a ranged tanker. I hate melee classes - that is what stopping me from playing a tanker, not people's attitude or no damage (i play a healer atm), and i think there are more people. I dont care if it will reduce or increase queue times for dps - it just would be nice to have tanker class that is not melee.

This.

Whoever first came up with this standard "Tank / Healer / Damage Dealer" locked-in role composition back in the Dim Ages of RPGs made a tremendously awful compromise that spoils a whole lot of the fun.

This locked system was created in middle-late 2000 to make mmorpg games more accessible. In late 1990/early 2000 class systems were very flexible, allowing developing unique and customized characters, but required days of study and experiments (building a char was not fail-proof). Now it is fail-proof and locked.