Wait...your serious.
Under the "Old" system every class could litteraly do everything.
Pug, Marauder, Glad, Lancer could all tank like pros, do damage, spike hate, nothing any of them could do was special in any single way.
Con and Thaum might as well have had the same name as there spells were almost interchangable a person playing the game would have no idea what the difference between the two classes was.
Sure it was "Freedom" but for what? Letting every single class fill every single spot in a party was a good idea on paper, but as we have seen it was terrible in execution. I'm sorry but if you get upset when you need to use a variaty of people and classes to play the game you need to re-think why you are playing a MMO.
"The holy trinity" will always exist, go check out Star Wars I hear it's rather loose with it's class system. Then again it looks like a single player game wrapped in a MMOskin to me, but who am I to judge. Just giving you a suggestion sense you don't seem pleased with the game current direction.
Not that I'm saying "GTFO" either, I just think it's odd that someone actually found the class system in it's earliest state enjoyable at all. The freedom just led to me being bored and forced to level other jobs just so I could be good at my main class. Hell at least XI only made you level the other job half the way, FFXIV vanilla you had to level it to 50 to get any of the damn good skills.
Leveling Lancer felt just like leveling marauder, hell even more so when I had all my marauder skills on my Lancers hot-bar...ugh.